Before figuring out how to restore Windows 7 to start, you need to understand what the cause of the problem is. To do this, it will be useful to find out a little general information about how the download takes place, and what stages it includes.
General download information
Conventionally, the launch of Windows 7 can be divided into three stages, which, in turn, are divided into several phases.
OSLoader
This is the first stage of system startup, which starts immediately after the BIOS code is executed. First, a small group of drivers starts to work to read data from the hard drive. Then the Windows 7 bootloader (winload.exe) starts initializing and loading the kernel. The "SYSTEM" registry hive and one more group of drivers are loaded into RAM. The first stage lasts about 2 seconds and ends with the appearance of the operating system logo on the screen. 
MailPathBoot
The main and longest stage of the system launch. Visually, it continues from the appearance of the logo to the start of loading the desktop. It consists of several phases, the duration of which can be different - from a few seconds to a couple of minutes.
PreSMSS
During this phase, the Windows kernel is initialized, the plug and play device manager starts running, and the remaining drivers are started. Errors that occur at this moment are usually associated with malfunctions of the main components of the computer or incorrect operation of their software.
SMSSInit
The visual start of this phase is difficult to determine, but it is already part of the blank space that appears between the splash screen and the appearance of the welcome screen. The system at this moment performs the following actions:
- Initializes the registry.
- Launches the next wave of drivers that are not marked "BOOT_START".
- Starts subsystem processes.
The most common problems during this boot phase are related to the graphics card drivers.
WinLogonInit
WInlogon.exe is the file that launches the welcome screen, so the "WinLogonInit" phase starts at this point. During this phase, Group Policy scripts are executed and services are started. The duration of the phase varies greatly depending on the power of the processor.
Failures at this stage are often caused by incorrect operation of third-party applications, including antivirus.
ExplorerInit
Begins with the start of the shell and ends with the start of the window manager. During this phase, program icons appear on the desktop, and services continue to start. These processes are accompanied by an increase in the load on the computer hardware - processor, RAM, hard drive.
Malfunctions at this stage are usually associated with insufficient equipment power or its malfunction.
PastBoot
The last stage, which begins with the appearance of the desktop and ends after loading all the autorun components. At this stage, all applications that start with Windows begin to work. After the end of the "PastBoot" stage, the system goes into idle mode.
Problems that arise at this stage are usually associated with viral activity or incorrect operation of automatically loaded programs.
Crashes at different stages of loading
Problems at different stages of Windows startup manifest themselves differently: some are related to the hardware, others are related to the registry, and still others are related to drivers or important system files. Therefore, it is so important to understand what processes occur when the system starts up so that you can quickly determine the cause of the problem.
Hardware problems
It is often difficult to determine what is not working - a particular hardware or operating system. However, according to some signs, certain assumptions can be made about which device has failed:
All described errors are usually related to the computer hardware, however, there may be exceptions.
Damaged boot files
The appearance of a message like "Bootmgr is missing" at an early stage of the system startup indicates the absence of critical files, without which Windows cannot boot. 
However, sometimes no notifications appear - the cursor simply blinks on the screen, but no progress occurs.
Bootmgr is a standard Windows boot loader that is not available to the user, as it is stored on a separate hidden partition. You cannot accidentally delete it, but you can unknowingly format the hidden volume using external media.
When booting from external media, the hidden volume with the bootloader looks like this: 
Other important startup files are stored on the system drive in the Windows directory. The system registry data is also stored here.
Damaged registry
If the registry is damaged or unavailable, Windows boot may not even start. In this case, the system usually diagnoses the error on its own and prompts you to run the recovery tool. 
Often, the built-in system restore tool can help fix a problem with the registry by copying its configuration files from the backup storage. However, there are situations when there are no registry files on the hard disk or they are inoperative. In this case, the user must manually perform the procedure for restoring the system registry.
Startup Repair Tools
The easiest way to restore startup is to use the built-in Windows tools:
A list of system recovery tools will appear, in which you must select "Startup Repair". 
It will scan and automatically fix the detected errors, if possible. 
If nothing happened with the launch, you can try to restore the system by rolling it back to its previous state. Everything is standard here: you select a checkpoint with a working configuration and return the system to that period. 
Another way that often helps is repairing the Windows bootloader via the command line. You can also launch it through the "Recovery options" menu. On the command line, you need to enter several queries (all commands are entered without quotes):
After successfully executing all the commands and the report appears, Windows 7 should start to start normally.
There are at least three common errors that lead to problems with booting Windows 7. When an error occurs, the system displays a short message on the monitor screen indicating the problem. It is these small instructions that we will be guided by when solving the problems that have arisen.
Perhaps the most common error is Disk boot failure, insert system disk and press Enter.
It is characterized by the following situation: you turn on the computer, but instead of the usual loading of the Windows 7 operating system, this inscription is displayed to you. It means that the system recognized the disk from which it is not started by the system, that is, according to Windows 7, the system files required to start it are not on this disk. This can be caused by various reasons. Let's analyze the most common ones.
Possible variant. A disc was inserted into the DVD-ROM or a USB flash drive was connected and your BIOS is configured so that by default it sets one of these media to start. As a result, the system cannot find the files it needs to run on a USB flash drive or DVD and reports an error.
Elimination. You should try to disconnect absolutely all external drives: phones, memory cards, flash drives and external drives. After that, the computer should be turned on again. Most likely, the system will start correctly this time.
It may be that the recommendations provided above will not help. In this case, firstly, in the BIOS settings, set your system disk as the default startup device. And secondly, it is worth making sure whether the BIOS detects your system drive at all. It may be that he is out of order.
If the system correctly displays the system disk, you can use it. We will touch upon this a little later, at the end of the article.
If the system does not display your primary hard drive, you can try unplugging it and plugging it back in, or into a slot next door, if present.
Other problems, for example, viruses, etc., can also lead to this error. In any case, it is best to first check the methods that we mentioned. Most likely they will work. If not, then feel free to ask at the end of the article, in which we indicated the step-by-step elimination of Windows 7 problems using the utility.
Error BOOTMGR is missing
Due to this error, you will also not be able to start Windows 7 correctly - the message on the black screen is BOOTMGR is missing. Various reasons can also cause this problem, including all kinds of viruses. It can be caused by erroneous actions of an inexperienced user who accidentally changed the boot record of the hard disk. Also, physical HDD problems are often the cause of this error.
Elimination. Check if the hard drive itself is working on which the system is installed. Seek help from the Windows 7 recovery environment, which is described below.
NTLDR is missing error. Press Ctrl + Alt + Del to restart
This problem manifests itself in much the same way as the previous one. It is also worth using the troubleshooting environment to fix it.
When starting Windows 7, the user sees only a black screen and a mouse pointer
If, when the system starts, the familiar desktop with the start menu does not load, and all we can see is the mouse pointer, then everything is not so difficult and in the overwhelming majority of cases it is easy to eliminate. Very often this error occurs if you got rid of some serious virus with the help of an antivirus program, which has already managed to make trouble and these very troubles were not fully corrected by the antivirus program.
Elimination. Restart your computer and as soon as the mouse pointer appears, press Ctrl + Alt + Del. The Task Manager will appear immediately.
In it you need to select the "File" menu in which to create a new task (execute). A dialog box will appear, in it you should enter the regedit command and press Enter. This will launch the Windows 7 System Registry Editor.
We will need to view the sections in the editor:
HKEY_LOCAL_MACHINE / Software / Microsoft / Windows NT / Current Version / Winlogon /
- HKEY_CURRENT_USER / Software / Microsoft / Windows NT / Current Version / Winlogon /
Now you need to edit the value Shell.
With the first section, make sure the Shell parameter is set to Explorer.exe, if this is not the case, then install it yourself. In the second case, you need to go to the section and see: if there is a Shell entry in it, then it must be removed from there. Now all that remains is to close the registry window and simply restart the computer. Everything should fall into place.
And so, everything that we could not eliminate on our own, we eliminate using the standard system utilities
In most cases, if there are problems when starting the operating system, we can see the Windows 7 recovery screen. It is he who will help us in restoring the system startup. If the recovery screen is not displayed on our own, then at the next reboot of the system, we can call it up independently by pressing the key F8... Select "Troubleshoot computer problems" from the menu
Once problems are found, they are automatically corrected by the utility. But it may be that the system utility will not detect problems. Then we can use the system restore functions, this often helps if problems with starting the system arose due to the installation of a system update or third-party software. Since the service interface is intuitive, the problem will not be difficult to solve.
That's all. In 99% of cases, you will be able to solve one of the problems that leads to the error starting Windows 7. Otherwise, the problem is in the hardware of your computer. You can also, if you are sure that everything is in order with the hardware. Good luck!
If you encounter an error like “Operating system not found” while booting your computer, it can cause a nervous shock. But, if you have 7 installed, then you have nothing to fear. After all, these loading errors can often be resolved with just a few simple steps.
In many cases, the inability to boot Windows 7 may simply be due to an incorrectly set boot order in the BIOS. This can happen if your computer has more than one hard drive installed. Typically, the BIOS is entered a few seconds after turning on the computer by pressing a button. Delete or by pressing the dedicated function key. Once in BIOS, make sure your Windows 7 hard drive is in the correct place in the boot queue. If you don't know where to look, read the instructions for your motherboard.
Another possible reason for the computer not detecting Windows during boot is a hardware problem. If the BIOS cannot find your system drive, then make sure that all cables are connected to it properly. If your hard drive is making a strange sound like clicking and tapping, then it might be broken. Finally, it is possible that your hard drive is experiencing data corruption issues affecting critical system data such as the Master Boot Record (MBR).
If you suspect that your drive is broken, it’s a good idea to back up important data, scan it for errors from another computer, and even consider purchasing a replacement drive. Attempting to fix a boot problem on a damaged disk can result in data loss, so back up your data before you do anything else.
The MBR and other important boot data can also be corrupted by attempting to install earlier versions of Windows other than Windows 7 (such as Windows XP) or by third-party programs such as viruses. In case of a virus, it is recommended to scan the disk with an anti-virus program before taking any “corrective” actions. Otherwise, attempts to fix the disk with a virus may result in data loss.
Also, the appearance of messages about corrupted boot data can be caused by incorrect assignment of the active disk partition, which can come from an overly inquisitive Windows user with administrative rights.
Fixing MBR and other Windows 7 boot problems is most quickly accomplished with the Windows 7 installation DVD. But if you don't have one, you can alternatively use the Windows 7 system recovery disc, which we'll show you how to create it below.
If you don't have an installation DVD or a recovery disc, then do yourself a lot by creating a recovery disc now to avoid unnecessary headaches in the future.
Fix Master Boot Record (MBR)
Step one: Turn on your computer by booting from either the Windows 7 Installation DVD or the Windows 7 System Recovery Disc. Be aware that you may need to change the boot order in the BIOS to boot from the DVD.
Step two: When booting from your installation disc or from a recovery disc, you may be asked to select a language. Select it and then continue downloading. When using the installation DVD, when prompted below (or similar in another language), select Repair your computer.
Step three: It will take some time for the computer to search for installed Windows, after which you will be presented with a list of possible recoverable Windows. Choose the appropriate setting and proceed. If, by chance, a problem is found in one of your Windows installations at this early stage, the system may ask you if you would like it to automatically fix it. Here you can decide for yourself - should the system fix itself or not? If you do not want automatic correction, then simply select “no” (No).
Step four: When you reach the System Recovery Options screen, which is shown below, you will be presented with a selection list that can help you recover your damaged Windows 7
If you wish, you can first try the Startup Repair option, which in automatic mode often solves many boot problems. However, in this article, we will be using the Command Prompt option to solve our problems manually. Therefore, click on Command Prompt to continue.
Step five: At the command prompt, enter the following command and press Enter:
If successful, you will see a corresponding greeting message, such as “The operation completed successfully”. This is what you need! Your MBR has been restored!
Although the above command fixes the MBR (and sometimes it is enough), there may still be an error with the boot sector of the system partition and with the Boot Configuration Data (BCD). This can happen if you tried to install an operating system other than Windows 7, such as Windows XP. To write a new boot sector, try the following command:
If your Windows 7 is still not detected when the computer boots, or you want to include more than one operating system in the system boot list, try the following command to rebuild your BCD:
bootrec.exe / RebuildBcd
The above command will scan all your drives for other Windows 7 compatible operating systems and allow you to add them to the system boot list. If that doesn't work, then you may need to back up your old BCD folder and create a new one using the following commands:
bcdedit / export C: \ BCD_Backup
c:
cd boot
attrib bcd -s -h -r
ren c: \ boot \ bcd bcd.old
bootrec / RebuildBcd
Some users just delete the old boot folder and try the above steps to fix their boot problems. But this is not recommended.
How to change active sections
After deliberately changing the active partition on our system drive during system boot, we encountered a BOOTMGR (BOOTMGR is missing) loss error, which prevented us from booting Windows. This is a common error that occurs when you start to “play” with partitions on the system disk. And solving it can cause a serious headache if you don't prepare for it in advance.
To reverse the active partition, use your Windows 7 recovery disc or installation DVD and follow the steps below.
Step one: Follow the steps above (one through four). This should bring you to the command line of the Windows recovery environment.
Step two: Type DiskPart and then press Enter.
Step three: Type List Disk and press Enter. This command will list and assign numbers to all drives connected to your computer.
Step four: Enter Select Disk x, where x is the number of the disk containing the partition you want to make active. Hit Enter.
Step five: Type List Partition and press Enter. This will allow you to see a list of partitions on the selected drive. Determine which section you want to make active.
Step six: Enter Select Partition x, where x is the number of the partition you want to make active. Hit Enter.
Step seven: Now just type Active and hit Enter. This command will make the section you selected active.
How to create a Windows 7 system recovery disc
Windows 7 makes it easy to create your own system recovery disc, if, of course, your operating system is already installed and working.
Step one: Click on the Start button -> Programs -> Maintenance -> Create a system recovery disc.
Step two: Insert a blank CD or DVD into your optical drive.
Step three: Click on the create disc button and let the program do its job.
What you need! The program only needs to write 140-160MB of data to disk (depending on the type of operating system), which should take only a few minutes. If you do not have an optical CD / DVD-R drive that you can use to create a recovery disc (and for later use), then you can download yourself an ISO image with a Windows 7 system recovery disc and then use it to create bootable USB stick.
How to create a bootable USB flash drive with a Windows 7 system recovery disc
Step one: Download the Windows 7 system recovery disk image ().
To download you need a torrent client like. Alternatively (if you have a DVD drive), you can use the Windows 7 installation disc or the Windows 7 system recovery disc. In this case, you should skip directly to the seventh step.
By the way, with the help of the installation disk with Windows 7 in the seventh step, you can not only restore the system, but also install Windows 7 from a USB drive, which is very useful if you are a netbook user.
Step two: Open a command prompt with administrator rights. To do this, click on the Start button -> Programs -> Accessories -> right-click on the Command Prompt and select Run as administrator.
Step three: After confirming all UAC prompts, you should be at the command line. Make sure your USB stick is connected to your computer, then type DiskPart and press Enter.
Step four: Type List Disk and press Enter. Determine which number corresponds to your USB stick. In our case, the USB flash drive corresponds to Disk 1. We determined this by the capacity of the flash drive, which we have for 2GB.
Step five: Enter the commands below in order, changing the disk number to your own. Warning - executing the commands below will erase all data on your USB stick or drive of your choice.
Select Disk 1
Clean
Create Partition Primary
Select Partition 1
Active
Format FS = NTFS
Step six: After DiskPart has successfully formatted your USB stick (which may take several minutes), you need to enter the following commands:
Step seven: Now you need to copy the contents of the ISO image (or DVD) you downloaded to your USB stick. It's just a couple of folders and a file. To extract files from an ISO image, you need a program like.
Step eight: Now that the files have been copied, you need to make your USB stick bootable. To do this, you need to download a small file. This file can also be found in the boot directory of the Windows 7 installation disc. After downloading, place bootsect.exe in the root folder of your USB stick.
Step nine: Back at the command line, you need to change the current directory to the root directory of the USB stick. In our case, the flash drive corresponds to the letter E, so we will use the following commands:
e:
bootsect / nt60 e:
The bootsect command will add compatible boot code to the specified volume. If all goes well, you will have a bootable recovery USB stick. However, when using it, do not forget that it must be specified in the BIOS boot list.
Many computer and laptop users have probably encountered boot problems. Windows 7... The operating system simply refused to boot and gave an error. In such cases, it is impossible even to enter the Safe mode on F8.
The first thing that comes to mind in such situations is reinstalling Windows itself. The procedure is simple and well described in the guides: Installing Windows 7 and many others.
Reinstallation will solve the problem with booting the system, but I don’t want to lose documents, programs, I don’t want to configure everything again, installing drivers and applications, as well as configuring them can take a lot of time.
Comment: This guide does not cover hardware problems such as powering on the laptop itself, display problems, and so on.
Fortunately, the system boot problem can be solved more easily. Bootloader corruption is usually the cause of system boot problems. Windows, disruption of work MBR... To restore the system, you need to restore this same bootloader and MBR. How to do this will be described below.
Restoring Windows to Normal Boot
MBR and bootloader recovery process Windows 7 almost completely identical to that for Windows Vista... This means that the recommendations described below can be safely applied to recovery. Windows Vista.
Let's start. First of all, we need a bootable disk or flash drive with the distribution Windows 7... How to prepare them is described in detail in the guides: Installing Windows 7 from a USB flash drive on a laptop, netbook or regular PC
Now it's worth choosing an item System Restore at the bottom:
After that, the search for installed copies of Windows on the hard disk will start:
As a result, the wizard must find the installed Windows 7... Select it and click Further:
The Windows recovery menu should appear:
Let's consider what each point is for:
- Launch recovery- restore Windows bootloader and system files
- System Restore- system recovery from restore points. Restore points are created automatically when important, system updates are installed, and can also be created manually by the user
- System image recovery- Windows recovery from disk image
- Windows Memory Diagnostic Tool- checking the RAM for errors. Quite a useful thing.
- Command line- command line for manual recovery
We are interested in the first two points, as well as the last one. Consider first Launch recovery... This is the easiest way to restore normal system boot. Let's launch it. Diagnostics should start:
After a while, the problem will (or won't) be fixed:
Consider now the second menu item - System Restore... Let's try to restore the system from restore points. To do this, run System Restore:
Now select the last restore point and click Further:
Click on Ready agree with the warnings:
We reboot the laptop or computer.
P.S. It is far from always possible to solve the problem using the methods described above, therefore, you will have to start analyzing the text of the error message that appeared during PC startup and look for alternative options.
Windows 7 won't boot
A message with the text "BOOTMGR is missing" indicates that the Windows 7 bootloader is damaged or missing. To solve this problem, you will need a Windows 7 installation disc or a disc with ERD Commander (32bit or 64bit, corresponding to your OS), which can be found in. In the "Boot device priority" section of the BIOS settings, designate the CD / DVD drive as the first boot device. Then boot from the Windows installation disc and select the "System Restore" menu item. From the list of installed operating systems (if you have several of them), select the one you need and click the "Next" button. In the "System Recovery Options" window that appears, there are two items - "System Startup Restore" and "Command Prompt", and you will need them. The first option will automatically eliminate the problem with the start of the operating system, and if it fails, you will have to turn to the second. In the command line, type "bootrec / rebuildbcd", press "Enter" and agree to make changes to the boot configuration data by alternately pressing the "Y" and "Enter" keys. After that, all that remains is to create a new boot sector using the "Bootrec / FixВoot" console command and restart the computer.
Compressed partitions
As a result of erroneous compression of the partition with Windows 7 boot files, the message "BOOTMGR is compressed" may appear. The ntfs.sys file system driver, which is responsible for working with compressed disk partitions, comes into play much later than the Bootmgr.exe loader. In this case, you will again have to turn to the help of the Windows 7 installation disk, in the command line of which you need to sequentially execute a number of commands:
- expand bootmgr temp
- attrib bootmgr -s -r -h
- del bootmgr
- ren temp bootmgr
- attrib bootmgr -а + s + r + h
- bootrec / fixboot
Windows XP won't load
The NTLDR is missing error indicates that the NTLDR file, which is the Windows XP loader, is damaged or missing. Unlike BOOTMGR in Windows 7, which is stored in a separate hidden partition, the NTLDR file is located on the same disk as the operating system. It happens that inexperienced users mistake system files with unknown names for malware and no doubt delete them. Such a fate often befalls the innocent NTLDR, as well as another critical file for a successful OS boot - ntdetect.com. To solve the problem, you will need a Windows XP installation disc. At the very beginning of the boot process, you must press the "F10" key to get into the recovery console. With its help, you need to go to the Windows installation disk using the "X:" command, where X is the letter of the corresponding optical drive. Then it remains only to copy the two missing files to the partition of the hard drive with the OS by running the commands:
- litter i386 \ ntldr С:
- litter i386 \ ntdetectcom C:
This method is also effective in case of loss of any other system files, copies of which can be found on the installation disks of Windows 7 and XP, respectively. The NTLDR is compressed error is rare because it affects only Windows XP computers without SP2. It can occur when there are too many files stored in the root of the C: drive. A similar problem with compression of the NTLDR boot loader is solved in the same way as in the case of its damage or removal - by copying the original file from the Windows XP installation disk.
No boot device found
An error message appears "No bootable device" and its numerous variations ("Boot device not found", "Invalid boot device", "Non system disk or disk ergor", etc.) indicate that the computer did not even start to start the operating system, since does not see the boot sector or even the hard drive. To understand where the problem lies - at the software or hardware level, just go to the already familiar “Boot device priority” section of the BIOS settings. If the hard drive is not among the options offered, then the problem is hardware related. Perhaps the SATA or IDE cable or hard drive power cable is loose, or the HDD is out of order. If the computer recognizes the hard drive normally, the reason is programmatic and lies in the Master Boot Record (MBR) - either damaged or missing. Unlike the fixes discussed above, this situation is relevant both for Windows 7 and XP. Having booted from the installation disk, run the command in the recovery console: "bоtгes / fixmbr" (for Windows 7) or "fixmbr" (for Windows XP).
Driver error
Critical Windows error messages, called "Blue Screen of Death" due to the background color, are fairly common problems in Windows XP, but in Windows 7 they tried to make the system more reliable in this regard. The reason BSoD there may be hardware malfunctioning, such as RAM. Most often, BSOD messages at an early stage of loading appear after updating device drivers and contain the text "DRIYER_IRQL_NOT_ LESS_OR_EQUAL" along with the file name with the SYS extension. To remove the problematic driver through the "Device Manager", you can try to start Windows in safe mode since it uses a minimal set of drivers. To do this, press the "F8" key while loading the OS and select the "Safe Mode" item. If the "blue screen of death" still appears when booting in safe mode, you must return to the previous version of the driver, with which there were no problems. This can be done using a restore point, if it was created earlier. In Windows 7, for this you need to press the "F8" key during OS boot and select "Computer troubleshooting" in the menu that appears. After that, you will be taken to exactly the same "Recovery Options" menu as when using the Windows installation disc. Next, the item "System Restore", in which you can select one of the available points for rollback.
Corrupted bootloader file
The error like "Windows could not start because the following file is missing or corrupt: Windows \ System32 \ filename.dll" is specific to the Windows XP operating system only. It can be caused by a damaged or missing boot configuration file Boot.ini, which is not used in the new version of the OS. To fix the problem, use the "bootcfg / rebuild" command in the Windows XP Recovery Console, which will correct the existing or create a new Boot.ini file. The absence of other files in the system, primarily drivers with the SYS extension, happens in both Windows 7 and XP. The most effective way to solve the problem is to return the file to its place by looking for a copy of it on the Windows installation disk, borrowing it from another computer with the same OS version, or looking for the file by typing its name in any Internet search engine. If you don't have a second PC at hand, you will need a LiveCD with an OS that does not require installation to search, download and copy files. One of the more convenient options is. The exceptions are the System, Software, SАМ, Security and Default registry files, which are stored in the C: \ windows \ system32 \ config folder. You won't be able to replace them with copies from another computer, so the only option is to roll back to the restore point. In Windows XP, for this, you must first load the operating system with at least the standard registry branches, and only after that start the OS regeneration process. To do this, go to the Windows XP Recovery Console, as described above, and run a series of commands (take the System registry file as an example):
- md tmp
- litter c: \ windows \ system32 \ config \ system c: \
- windows \ tmp \ system.bak
- delete c: \ windows \ system32 \ config \ system
- litter c: \ windows \ repair \ system c: \ windows \
- system32 \ config \ system
Diagnostic and repair utilities
Bad sectors of the hard disk (bad blocks) can be the cause of many problems with loading Windows. The MHDD program, which runs from the disk (the image can be downloaded from the link), will help to check the hard disk. In the program menu, select the hard disk number from the list and start scanning sectors for errors and correcting them - “Remap | ON ". Bad blocks (bad blocks), as a rule, are concentrated at the beginning of the hard disk, so it is worth moving the OS partition away from the problem area. To do this, a boot disk with the MiniTool Partition WIZard NOT will work. (select "Partition 1 Move / Resize" in the program menu). BSOD can also be associated with RAM. A free application allows you to test RAM modules
There are at least three common errors that lead to problems with booting Windows 7. When an error occurs, the system displays a short message on the monitor screen indicating the problem. It is these small instructions that we will be guided by when solving the problems that have arisen.
Perhaps the most common error is Disk boot failure, insert system disk and press Enter.
It is characterized by the following situation: you turn on the computer, but instead of the usual loading of the Windows 7 operating system, this inscription is displayed to you. It means that the system recognized the disk from which it is not started by the system, that is, according to Windows 7, the system files required to start it are not on this disk. This can be caused by various reasons. Let's analyze the most common ones.
Possible variant. A disc was inserted into the DVD-ROM or a USB flash drive was connected and your BIOS is configured so that by default it sets one of these media to start. As a result, the system cannot find the files it needs to run on a USB flash drive or DVD and reports an error.
Elimination. You should try to disconnect absolutely all external drives: phones, memory cards, flash drives and external drives. After that, the computer should be turned on again. Most likely, the system will start correctly this time.
It may be that the recommendations provided above will not help. In this case, firstly, in the BIOS settings, set your system disk as the default startup device. And secondly, it is worth making sure whether the BIOS detects your system drive at all. It may be that he is out of order.
If the system correctly displays the system disk, you can use it. We will touch upon this a little later, at the end of the article.
If the system does not display your primary hard drive, you can try unplugging it and plugging it back in, or into a slot next door, if present.
Other problems, for example, viruses, etc., can also lead to this error. In any case, it is best to first check the methods that we mentioned. Most likely they will work. If not, then feel free to ask at the end of the article, in which we indicated the step-by-step elimination of Windows 7 problems using the utility.
Error BOOTMGR is missing
Due to this error, you will also not be able to start Windows 7 correctly - the message on the black screen is BOOTMGR is missing. Various reasons can also cause this problem, including all kinds of viruses. It can be caused by erroneous actions of an inexperienced user who accidentally changed the boot record of the hard disk. Also, physical HDD problems are often the cause of this error.
Elimination. Check if the hard drive itself is working on which the system is installed. Seek help from the Windows 7 recovery environment, which is described below.
NTLDR is missing error. Press Ctrl + Alt + Del to restart
This problem manifests itself in much the same way as the previous one. It is also worth using the troubleshooting environment to fix it.
When starting Windows 7, the user sees only a black screen and a mouse pointer
If, when the system starts, the familiar desktop with the start menu does not load, and all we can see is the mouse pointer, then everything is not so difficult and in the overwhelming majority of cases it is easy to eliminate. Very often this error occurs if you got rid of some serious virus with the help of an antivirus program, which has already managed to make trouble and these very troubles were not fully corrected by the antivirus program.
Elimination. Restart your computer and as soon as the mouse pointer appears, press Ctrl + Alt + Del. The Task Manager will appear immediately.
In it you need to select the "File" menu in which to create a new task (execute). A dialog box will appear, in it you should enter the regedit command and press Enter. This will launch the Windows 7 System Registry Editor.
We will need to view the sections in the editor:
HKEY_LOCAL_MACHINE / Software / Microsoft / Windows NT / Current Version / Winlogon /
- HKEY_CURRENT_USER / Software / Microsoft / Windows NT / Current Version / Winlogon /
Now you need to edit the value Shell.
With the first section, make sure the Shell parameter is set to Explorer.exe, if this is not the case, then install it yourself. In the second case, you need to go to the section and see: if there is a Shell entry in it, then it must be removed from there. Now all that remains is to close the registry window and simply restart the computer. Everything should fall into place.
And so, everything that we could not eliminate on our own, we eliminate using the standard system utilities
In most cases, if there are problems when starting the operating system, we can see the Windows 7 recovery screen. It is he who will help us in restoring the system startup. If the recovery screen is not displayed on our own, then at the next reboot of the system, we can call it up independently by pressing the key F8... Select "Troubleshoot computer problems" from the menu
You will see a message that will contain information that the system files are being loaded, you will also be asked to select a language.
During only one startup of Windows, the system runs many processes. Accordingly, when Windows does not boot, there may be several reasons for this. Below we will look at what can trigger the error when starting Windows, and also fix the problem that has arisen.
Hardware problems
We will not dwell on the inoperability of the equipment, since on your own and without the necessary skills, it is rather difficult to determine which equipment has broken down. Below are some types of errors that indicate that the problem is related to the hardware:
- A repeated failure of the same driver may indicate the inoperability of the device, which is controlled by this driver.
- Errors that are accompanied by a blue screen may indicate a problem with the device's RAM.
- Various artifacts or a completely absent image indicate problems in the operation of the video card.
- If Windows loading hangs at some stage or does not start at all, this indicates an inoperative hard drive.
- If the computer suddenly turns off during boot, then this may indicate a malfunction of the power supply, motherboard, and sometimes other hardware.
Problems with damaged boot files
If at the first stages of Windows startup the system detects the absence of important boot files, the message “BOOTMGR is missing” may appear on the screen. In addition, this problem may be accompanied by both other messages and the complete absence of any inscriptions (black screen with or without a cursor).
Bootmgr is an operating system loader that is not available to regular users. However, users can easily format it by booting from external media. After that, the operating system will not boot.
Registry problems
If the problem is caused by a corrupted registry, Windows may not even start loading. Instead, the screen displays a message that the system has crashed and prompts you to use the recovery environment.
Quite often, restoring will help load the registry from a backup and fix Windows startup problems.
However, recovery may not always be successful, because the system may not have the necessary backups.
Troubleshoot Windows startup problems
Recovery environment
It is much more convenient to restart Windows 7 than Windows XP, which did not have time to get a recovery environment. When installing Windows, this environment is installed on the hard drive, has a separate partition and a separate boot loader. That is why the recovery environment does not in any way address the problems faced by Windows.
To start the recovery environment, press the F8 key and select "Troubleshoot computer problems" from all Windows boot options.
Next, to get into the recovery environment, the system will ask you to enter a password. If you have forgotten your password or do not have administrator rights, you will have to run the recovery environment from the installation disc.
This point is worth resorting to if you do not know the exact reason why Windows does not start.
Select Startup Repair. The system will scan and fix any problems it finds.
This method can be used if Windows stopped loading after installing the program, infecting the computer with viruses or changes in the registry.
The System Restore option will help fix the problem, but only if the restore points have been saved.
The principle of operation is quite simple: you select the desired restore point, which is dated at a time when there were no problems with Windows. The system will roll back and Windows will boot normally.
It is used when there are no backups saved on the computer, but you have a recovery point saved on removable media.
Select System Image Restore, and then connect the removable media containing the system image archive to your computer. Then follow the instructions of the Recovery Wizard.
Manual Registry Repair
Applies when the above instructions did not correct the problem. In Windows, the registry is backed up every 10 days, so you can try to download the latest working backup yourself.
- From the list of available options, select Command Prompt and type the following command "notepad" into it, then press Enter. The standard Notepad program will start. Select "File" - "Open" in the program header.
- Go to directory C: \ Windows \ System32 \ config
- At the bottom of the window, in the "Files of type" column, change the option to "All files" to see the full contents of this folder. The following list of files pertains to the current registry: Default, Sam, System, Security, Software (no extension).
- Each of these files must be renamed or the .old extension added to them.
- In the folder "Config" open the folder "RegBack"... This is where the registry is backed up. Copy them one by one to a folder "Config".
- Go back to the window "Recovery options" and at the very bottom select the button. If the problem is caused by a registry malfunction, Windows will start normally.
Recovery files
Windows has a built-in wonderful utility that perfectly restores protected Windows files. On the menu "Recovery options" select item "Command line" and write the following command in it:
/ scannow / offbootdir = C: \ / offwindir = C: \ Windows
Team "Scannow" will start a system scan, "Offbootdir" indicates the letter of the system drive, "Offwindir" leads to the Windows folder.
Please note that in the recovery environment, the drive letters may not match those seen during normal Windows startup. Therefore, before you start scanning, be sure to launch Notepad (this process is described above) and check the letter of the system drive in Explorer.
Manual file recovery
If the above methods did not bring the desired result, you should try to manually restore the boot files, as well as overwrite the HDD master boot record.
To do this, open the menu "Recovery options" – "Command line" and run the following command, after specifying the letter of the section through Notepad:
Now run the following two commands one at a time:
After that, resume restarting Windows.
These methods help to resolve many errors of loading Windows OS. If the given tips did not help you, all that remains is the help of the service center - the problem may lie in the hardware part.
Often, when working on a computer, there is such a drawback as, Windows 7 does not start, startup recovery does not help. In previous versions of the OS, there was no recovery, which means that the choice of the Windows 7 system makes it possible to do everything as it was, without loss.
In order to restore the system, we need to decide how to do it. There are several categories. Namely:
By loading the last successful login.
For the fastest elimination of the system, you need to start the PC and hold down the F8 key. Then select the item " last known good configuration"And press Enter.
This method allows you to boot your computer, and restore all data from the registry, as well as driver files that contribute to the successful boot of your OS.
Restore the system in a regular manner.
If the download did not help, then you need to turn to system recovery, and for this you need to have existing restore points. They allow you to roll back computer settings to the point when the entire device was functioning. System Restore is located in the start menu, in the control panel sub-item. To do this, you need to select the appropriate date and follow the instructions in the future. If the recovery is successful, after the reboot, a window will appear notifying about this.
"System Restore" using the main windows disk.
If windows 7 still does not start, startup recovery does not help, then you should turn to Safe Boot. A menu that still starts when F8 is held down. Select "Troubleshoot computer problems" from the list of suggested options. After that, you need to insert the original disk with the operating system corresponding to the installed one, and select the "System Restore" field. Next, a window will appear with several options for recovery.
Considering that "launch recovery" did not help us, then we should select " System Restore", And further, as in the previous paragraph, we select the available restore points.
By resorting to the system backup that was created earlier.
In order to use the restore from a backup, you must connect a USB device with this very file. And go to Start, where to select Control Panel and then restore. If the system does not start, and there is no way to do this manipulation, then you should go through the previous paragraph. In the new window, select "p advanced methods…", Further " use the system image created earlier". Then you will be prompted to use profile archiving. Here already think for yourself, you need it. Then you need to restart your computer, and go through all the instructions for setting it up.
Conclusion
If none of the methods helped and windows 7 still does not start, startup recovery does not help, then you should reinstall the operating system, and you will have to lose all your data.
