When working with external devices, there are often failures with USB ports when connected. Windows displays: "USB device not recognized" or "Invalid device descriptor". Such notifications do not give a specific answer to the question of where exactly the problem occurred, so you need to check all possible options.
USB device not recognized - what to do
The problem must be looked for by the elimination method:
- Check the operation of the connected peripherals with other PCs / laptops / tablets.
- If the connected peripherals are working properly, look for the problem in the software or hardware of the PC.
Hardware part
Important! Some users were helped by a complete blackout of the PC. To do this, turn off the computer and remove the battery (+ 3V) from the motherboard for a few minutes.
Driver setup
Check your settings:
If the OS does not find the driver on the Internet in the "Other devices" section, then you can search manually:
The information we need will be displayed in the VEN (Vendor - manufacturer) and DEV (Device - device) parameters.
If peripherals in USB Controllers are displayed with a yellow exclamation mark icon:
Important! Some users were helped by removing obsolete entries of previously connected equipment. Read about it below.
To delete records of all peripherals connected up to this point:
- Disconnect all USB peripherals from your computer (except mouse and keyboard).
- RMB on Start → Command Prompt (administrator).
- Type the command and hit Enter: set devmgr_show_nonpresent_devices = 1
- Then type in command line and press Enter: start devmgmt.msc
- Computer Management will open. Go to Device Manager → View → Show Hidden Devices.
- In turn, in all categories, remove the semi-transparent icons. Do not remove dark ones.
- Go to USB Controllers and completely remove all USB Root Hubs. At the notification "Remove driver", put the marker (to erase the installed drivers along with the mentions). Dismiss the "Restart PC" message and remove any USB hubs.
- Restart your PC and wait while the drivers are installed and configured.
- Then insert unrecognized peripherals into the USB port and check its operation.
Power supply setup
The problem is common among laptop users. After connecting the drive via USB 3.0, an "Unknown device" error occurs. This is due to the power-saving feature of laptops, which turns off the power supply to unused ports during idle time. To disable the feature, go:
- Control Panel → Power Options → Select the scheme your laptop uses → Set up the power scheme.
- In the "USB Settings" tab → The parameter of temporary disconnection of the USB port, translate from "Allowed" to "Forbidden".
- Save changes, connect peripherals again. Reboot your system if required.
Important! After doing all of the above, still the error? Dig into the BIOS settings. Help to fix the problem: reset BIOS settings to default, flashing BIOS to the latest version (see the motherboard manufacturer's website), software disable / enable USB 2.0 and 3.0 in BIOS settings.
If the tips in the article did not help,. Describe the problem in detail, we will try to figure it out and fix the problem together.
Why am I getting the error "Failed to request a USB device descriptor"?In general, the situation when, when inserting a flash drive into a USB port, an error message appears, not at all a single one. The user is given a message that "unknown USB device". This is called a USB device descriptor request failure. When you first insert a USB flash drive into a USB port, the necessary drivers are automatically searched for, after which, within a few seconds, the device is recognized by the computer. If the system fails to find the necessary drivers automatically, then an error message is displayed. A "Device Descriptor Request Failed" or error code 43 indicates that the problem is in the OS software. How to be in such a situation and what you need to know in order to independently cope with the error that has arisen, we will learn from today's release.
The main reasons for the error "Failed to request a USB device descriptor on Windows 10"
An error of a failed request for a USB device descriptor can occur not only due to an OS failure, but also as a result of damage to the USB input or the flash drive itself. Experts report that the causes of error code 43 are the following factors:
- Malfunctioning USB device or computer connector. Flash drives of Chinese quality are often out of order, which have an underestimated price.
- The virus that contributed to the failure of system files.
- The registry is damaged, which could result from the installation or update of the operating system.
- Aging of drivers, as well as their damage or the occurrence of conflict situations.
There are more than enough reasons for the error in question. To fix it, it is necessary to determine the source of the error and take appropriate action.
How to troubleshoot the error "Failed to request a USB descriptor device" and how to solve the problem with the error "Code 43".
Sometimes, to fix the error, you just need to clean the USB port so that the computer recognizes the USB flash drive. In each specific case, the solution of the problem must be approached individually. If the USB flash drive is not detected by the computer in one port, then you should plug it into another USB connector on your computer or laptop.
I Equipment check
First of all, you need to start troubleshooting by checking the physical health of the USB device, as well as its contacts and cable. Finding such a malfunction is not difficult on a computer, but with a laptop the situation is more difficult. The check is carried out by removing the cover from the system unit, and carrying out a visual inspection.
Plugs or connectors can become dirty, dusty, or corroded, causing poor connection. Fault checking should begin exclusively at the physical level. The procedure at the physical level includes the following manipulations:
1. Cleaning contacts.
2. Connecting ports to other connectors.
3. Checking ports on another computer.
Only after a physical check has been carried out, and it is revealed that the USB ports are in working order, can one resort to the research procedure at the software level. If Windows 10 does not read the data again, giving the same error code 43, then you should check the status of the drivers. Let's take a closer look at how to check the status of drivers on Windows 10.
II Checking the status of drivers and updating them
1. Not infrequently, the cause of the error "Failed to request a USB device descriptor" is a violation of drivers. The second step towards fixing the problem begins with the fact that you need to update your Windows 10 drivers. Not many people know how to do this. The procedure is performed by carrying out the following manipulations:
Open "Device Manager" through "Start" and "Control Panel".
2. In the "Device Manager" window that opens, you need to find a section called "USB Controllers". The "Device Manager" section displays a list of all equipment connected to the computer.
3. In the USB Controllers list, find the GenericUSBHub item, as well as the USB Root Hub and USB Composite Device. A number of certain manipulations should be carried out with each of these devices. They include the procedure for updating the drivers. To do this, on each element, call a submenu with the right mouse button, and then select the "Update drivers" item.
4. After that, a window will open in which you are asked to select one of two options: "automatic search for updated drivers" or "Search this computer".
You need to choose the second option, as shown in the screenshot above. After that, a window will open in which you need to click the "Next" button.
5. After that, the manual search for drivers will start. If the drivers need to be updated, the system will display an appropriate message. This will start updating them, and after the installation is complete, the system will have to detect an unidentified USB device.
Rarely, the system cannot find drivers on its own, so the problem can be solved by downloading them from the official website. The above steps should be performed for each item, and then check the health of the USB device.
It is interesting! If you decide to download the drivers manually, then the download should be performed exclusively from the official Windows website. Downloading drivers from unverified resources can lead to your computer being infected with viruses.
III Check for power consumption and discharge static voltage
If the drivers are updated or do not require this procedure, then you can fix the "USB device descriptor request failed" error by checking the power consumption of the USB ports. To check the power consumption of USB ports, you should do a number of the following:
Open the "Power" tab, in which the "USB Root Hub" section is selected. In this section, you should make sure that the value of the power consumption does not exceed the allowable parameters.
To enter the "USB Root Hub" section, you need to open the "Device Manager".
In this section, go to any equipment in the "USB Controllers" section, and then right-click to bring up a submenu.
In this submenu, you select the "Properties" item, and then the "Power Management" tab opens.
In this tab, uncheck the box next to the item "Allow the disconnection of this device to save energy". After that, it is recommended to restart the computer and check that there is no error when inserting the flash drive into the USB port.
To reset the static (residual) voltage that remains on the USB ports when removing the USB flash drive in an unsafe way, you need to perform the following manipulations:
- Turn off your computer or laptop. After turning off the laptop, you need to remove the battery, and from the PC, unplug it from the outlet.
- Now you need to press the power button, and hold for a few minutes.
- By keeping your device de-energized for 1 minute, you can start it.
- After that, the correct functioning of the ports is checked, as well as the disappearance of the error "code 43".
- After performing these actions, the error must be eliminated.
What if the problem persists ...?
What to do if the problem with starting the flash drive after the above steps still persists. There are a number of other actions that will help solve the problem, but they should be performed only in the presence of an experienced computer technician.
- Reset BIOS settings. If you reset the settings in BIOS incorrectly, the consequences can be fatal, so it is better to entrust the procedure to an experienced specialist.
- Updating or reinstalling Windows 10. Even a beginner can do this if you follow the instructions.
- If the above steps did not help to fix the problem, then there is only one way - replacing the USB ports.
Concluding today's post - Failure to request a USB device descriptor, it can be noted that any problem can be solved if you find the right approach to fix it. You always need to start by looking for reasons, so go for it, because now the instructions are in your hands.
At the modern pace, we do not notice how often we connect and remove various USB devices, and when we see an error, the request for a descriptor fails when working with Windows 10, we get scared, not knowing where to go and what to do. This may be due to several factors.
- Problems in the hardware of the computer related to power.
- Static electricity
- Energy saving.
- Incorrect operation of drivers.
Let's go through each item step by step with clear instructions.
Insufficient nutrition
The situation is that each connected device: printer, scanner, mouse, keyboard, external HDD flash drive, smartphone for synchronization, etc. food is required. Naturally, it is impossible to have such a number of ports, and we resort to using usb-hub'a - these are splitters with many inputs - even those that, with additional power from the mains, cannot always provide sufficient power.
Initially, as soon as the system generates the error "Code 43 Failed to request a usb device descriptor" in windows 10, you need to extract from the port and:
- try to connect directly - if the connection was through the hub - it works, then there is not enough power;
- check the performance on another PC, if it works, then we are looking for a snag in our computer at the software and hardware levels;
Let's check the power:
- Right-click (RMB) click on "Start" → "Device Manager"
- "USB controllers" → "Root USB-hub" → PCM "Properties"
- "Power" tab → see that the required power does not exceed the available power. This is how all root hubs need to be checked.
Removing overvoltage
An error in windows 10 "usb device not recognized_ device descriptor request failed" is also possible in the case of a problem with the power supply of the ports, it is necessary to reset the voltage and remove static clots. Follow the instructions step by step:
- Remove all USB devices.
- Turn off the computer, not in a completely familiar way, so hold down and select "Shutdown", be sure to wait until the system is completely shut down.
- Unplug the power cable from the socket - completely de-energize, then:
- For stationary computers - hold down the on button. - about 10 seconds (exactly when everything is de-energized) and then release.
- For laptops with removable batteries - remove and then hold down the power button. - for the same period of time.
IMPORTANT!!! If the laptop is under warranty and the battery is under the cover - do not remove it!
4. Plug everything back in and turn on your machine as usual.
5. And again, one by one, slowly insert our devices into the usb ports.
Windows 10 power saving and bos usb handle request failure
An error of this kind can happen completely unexpectedly, the fact is, after active work in order to save energy, it is possible to automatically disconnect ports, this can be eliminated and is done in almost a few clicks, let's get started.
- RMB click "Start" → "Device Manager" - for inexperienced users
- + [X] for more advanced users call the same menu.
- "USB_controllers" → then for each "Composite USB device" and "Root USB hub", as well as "USB Generic Hub", right-click to call the context menu → "Properties"
- tab "Power_Management" → uncheck "Allow_switching_this_device_for_energy_saving" → OK
When finished, try reconnecting the external device. Working? Fine! Otherwise, we continue.
Drivers: updated!
In other words, we avoid the error of the usb device descriptor in windows 10 - after doing all of the above or in part and not arriving at a result, think about it. Why could a suddenly unknown, and hitherto very well-known device appear? Apparently it's worth updating the drivers, we'll tell you how to do it correctly. Again, we will reinstall for all categories, as with power management.
- Go to the "Device Manager" - the methods are described above
- "Select a driver from the list of already installed" → "Next"
- The driver must be specified "Root USB ..." see the screenshot for details → "Next" → Successfully installed
If the error is resolved and there is no longer an "Unknown device" in the list, then you can not update the rest of the drivers.
Invalid handle when logging into Windows 10!
From the moment Windows boots up, errors begin, although before that everything was fine, what's the matter? The fact is that many people ignore the installation of the driver on the motherboard and sooner or later, after the next update from the download center, an error occurs. The first and foremost thing is to download drivers from the official website of the motherboard manufacturer, they can be named in the list as: "ACPI_Driver", "Intel_Management Engine_Interface", "Firmware utilities", "Intel_Chipset_Drivet" and so on. We recommend that you take seriously the selection of the resource from which the download will be made. There are times when there is no firewood for a dozen, so feel free to download to Windows version 8 - compatibility mode, but certainly the bit depth of your Windows 10.
- Download driver
- Install
- System restart
- We check and rejoice at the absence of an error.
The problem persists ...
After trying all the instructions, the problem in the form of a device descriptor failure with Code 43 prevents you from working or playing your favorite games? Let's go through the possible options.
- It is worth checking the BIOS, you may need to reset - you should not experiment on your own, of course you can do it yourself, but only if your level of computer skills is "God".
- You may need to update Windows or a complete reinstallation, if you plan on your own - see paragraph 1.
- We do not want to tell horror stories, but if the problem is not at the software level, then at the hardware level, contact the SC for qualified assistance, because Replacement of USB ports may be required.
We will be glad if the article helps to fix the error, even more interesting and useful information can be found on our website, for example:
- What to do, if ;
- why there is a black screen when loading in Windows 10;
- how .
If, when connecting something via USB in Windows 10 or Windows 8 (8.1) - a flash drive, phone, tablet, player or something else (and sometimes just a USB cable), you see an Unknown USB device in the device manager and a message about "Device descriptor request failed" with error Code 43 (in properties), in this manual I will try to give working ways to fix this error. Another variation of the same error is a failed port reset.
If the previous method worked, and after a while your Windows 10 or 8 started again writing about the device descriptor failure and code 43, an additional action can help - disabling power saving functions for USB ports.
To do this, just like in the previous method, go to the device manager and for all Generic USB Hub devices, open the USB Root Hub and USB Composite Device through the right click "Properties", and then on the "Power Management" tab, disable the "Allow turning off this device to save energy. " Apply the settings you made.
Abnormal operation of USB devices due to power problems or static electricity
Quite often, problems with the operation of connected USB devices and a device descriptor failure can be solved by simply turning off the power to the computer or laptop. How to do it for PC:
- Remove the problematic USB devices, turn off the computer (after shutdown, it is better to hold Shift when you press Shut Down to turn it off completely).
- Unplug it from the outlet.
- Press and hold the power button for 5-10 seconds (yes, on a computer unplugged), release.
- Plug your computer in and just turn it on as usual.
- Connect the USB device again.
For laptops from which the battery is removed, all actions will be the same, except that in paragraph 2, "remove the battery from the laptop" is added. The same method can help when (there are additional methods to fix this in the specified instructions).
Chipset drivers
And one more point that can cause the request for a USB device descriptor to fail or the port to fail is not installed official drivers for the chipset (which should be taken from the official website of the laptop manufacturer for your model or from the website of the manufacturer of the computer motherboard). Those that are installed by Windows 10 or 8 itself, as well as the drivers from the driver pack, do not always turn out to be completely working (although in the device manager you will most likely see that all devices are working fine, except for the unidentified USB).
Such drivers may include
- Intel Chipset Driver
- Intel Management Engine Interface
- Various Firmware Utilities Specific to Laptops
- ACPI Driver
- Sometimes, separate USB drivers for third party controllers on the motherboard.
Do not be lazy to go to the manufacturer's website in the support section and check for such drivers. If they are missing for your version of Windows, you can try installing previous versions in compatibility mode (as long as the bit is the same).
At the moment, that's all I have to offer. Found your own solutions or did one of the above work? - I will be glad if you share in the comments.
Comments (196) on Request for device descriptor (Code 43) failed on Windows 10 and 8
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- right-click on the name, in the pop-up menu, click "Update drivers";
- search for drivers on the computer, select from the list of already installed ones;
- most often there is only one driver in the list, but if there are several of them, you must select the first one, click the "Next" button and wait for the installation.
If the actions taken are successful, the system should detect an unrecognized connection, then you will see its name in the list. But if not, then you need to try another option to update the drivers, download them from disk, or download drivers compatible with Windows 10 from the official website. You should also check and update the drivers for the computer chipset. Find and download new drivers for your operating system from the hardware manufacturer's website.
Checking Power Consumption and Discharging Static Electricity
In the properties of the "USB Root Hub" on the "Power" tab, make sure that the power consumption does not exceed the allowable value. If such a problem is present, you must completely de-energize the computer:
After starting the operating system, the problem should be resolved.
Energy saving setting
Failure of the descriptor request (code 43) can also appear with some frequency, then there is a possibility that the connectors, after some time, are de-energized.
Go to the "Device Manager" and in the "Controllers" section open the properties of these objects: "Generic USB Hub", "Root Hub", "Composite Device" . If you see that the power saving function is enabled on the Power Management tab, uncheck the box next to this item.
If none of the solutions fixed the problem and Windows 10 still gives an error, check the USB operation in the base BIOS. You can use an installation flash drive for this purpose. The USB hub may be disabled in the system settings. If enabling the function did not help to see the USB flash drive, you can update the BIOS.
Do not rush to write off the connected devices, motherboard or computer connectors and take everything for repair. Of course, sometimes there is such a possibility, but these are already extreme measures and for the most part the problem is solved in one of the ways listed above.
