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Published: July 10, 2016 | Applies to:

If your USB device not recognized in Windows 10 and labelled as Unknown USB Device (Device Descriptor Request Failed), here is how to fix it.

When it comes to transfer our data from one device to another, Universal Serial Bus (USB) devices are something which will first come to your mind. We all use these USB devices aka pen drives because they’re convenient and easy to use. But sometimes, Windows may not recognize your USB device and hence you can’t not take benefits of that pen drive.

This is not strictly a Windows 10 problem, but may occur with any of Windows edition you’re using. Hence, the suggestions mentioned in this article to fix, applies to all them. Talking about the cause, they may be miscellaneous. For some USB drives, malfunctioning hardware might be the problem, while for some, outdated drivers may be the culprit.

We faced this issue on Windows 10 Pro, after plugging USB device (Apple iPad in this case), we got following notification:

USB device not recognized

The last USB device you connected to this computer malfunctioned, and Windows does not recognize it.

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

Then we checked the same device in Device Manager (run devmgmt.msc command to open this). The device listed under Universal Serial Bus Controllers with an exclamation mark on its entry. Here the device was renamed to:

Unknown USB Device (Device Descriptor Request Failed)

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

Then property sheet mentions the detail of this error as:

Windows has stopped this device because it has reported problems. (Code 43)

A request for the USB device descriptor failed.

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

Since Code 43 is mentioned here, you should eject the device and then re-plug it correctly and this should suppress this case. You may also try right clicking the device as mentioned above and select Uninstall. Then you can re-plug the device and reinstall it, see if that helps. You might want to give a shot to update USB device drivers as well.

If nothing helps, here is how you fix this error on your system, so that your USB device started working again:

FIX : Unknown USB Device (Device Descriptor Request Failed) In Windows 10

Method 1 – Enable Enhanced Power Management For USB Device

1. Open Device Manager by running devmgmt.msc command. Expand Universal Serial Bus Controllers and right click on the device not recognized, select Properties.

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

2. In the property sheet, switch to Details tab. For the Property drop down, select Device instance path. In the Value section, highlight the value and right click it, select Copy.

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

Registry Disclaimer: The further steps will involve registry manipulation. Making mistakes while manipulating registry could affect your system adversely. So be careful while editing registry entries and create a System Restore point first.

3. Press W8K + R and put regedit in Run dialog box to open Registry Editor (if you’re not familiar with Registry Editor, then click here). Click OK.

Windows 10 Registry Editor

4. In the Registry Editor window, press Ctrl + F and paste the Value we copied in step 2, click Find. This should take you to registry key of problematic USB device. You can also manually navigate to its registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\<Device Instance Path>\Device Parameters

*Substitute <Device Instance Path> with the Value we get in step 2.

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

5. In the right pane of Device Parameters registry key, right click and select New > DWORD Value. Name the newly created registry DWORD (REG_DWORD) as EnhancedPowerManagementEnabled. The DWORD Value data should correspond to 0.

[FIX] Unknown USB Device (Device Descriptor Request Failed) In Windows 10

Close Registry Editor, and unplug the USB device. Reboot the machine, re-plug the device and the issue should no longer persist.

Method 2 – Using Hardware and Devices Troubleshooter

To resolve this problem, you can also take the advantage of in-built troubleshooters available in Windows 10. For this case, you should run Hardware and Devices troubleshooter to automatically found and fix issues:

Steps to run Hardware and Devices troubleshooter in Windows 10

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We hope after running the troubleshooter, you would be able to resolve this issue.

Let us know, if you still have the issue, via your comments!


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7 Comments

  • Hi, I am trying to connect a old tablet into flashmode to flash a new firmware but the pc wont recognize it always appearing as an unknown usb device (device descriptor request failed).
    I have tryed these solutions and many others and still nothing…. Is there a way to prevent windows to request a device descriptor?
    As it came to my understanding that in windows 8 it did not request it, only from windows 8.1 and above…

  • none of the steps above worked. my phone says the same message on two laptops i have so im thinking its a hardware problem.

  • i followed exactly the guide and it worked, but later it does not work anymore. i still have the same problem. please help

  • Kapil Arya

    ^^ What does troubleshooter says now?

  • Of course it doesn’t work at all… another expert for nothing.
    It’s like curing the symptom but not the illness.
    I need somethin’ that cracks Windows 10 and resolve all the bugs… I’m tired as hell, with Windows 95 there weren’t all these stupid problems.

  • hi
    i got the device discriptor failed thing with a crashed usb drive, tried the solutions above but they didnt work, any more ideas??

  • Kapil Arya

    ^^ Check the USB and see if it works with other machines. If there is no change in situation, USB is malfunctioned and needs to be replaced.

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