Bluetooth disappered from device manager with "Unknown USB Device (Device Descriptor Request Failed)" -error

Anonymous
2019-06-18T05:47:12+00:00

Hi!

I have some Bluetooth issues with my Asus UX330CAK notebook PC. Yesterday I tried to connect my bluetooth headphones to my computer like I normally would but, after pressing the bluetooth icon in notification center, the bluetooth icon disappeared. I looked it up on device manager, and I didn't find bluetooth there unless I clicked "show hidden devices". Now I can't find the bluetooth in hidden devices anymore. I can't enable bluetooth in settings, there is no bluetooth on switch anymore.

Also I in device manager I have one device in USB devices which has yellow warning sign and says: Unknown USB Device (Device Descriptor Request Failed), error code is 43. I have nothing connected to the USB-ports so I think this can be related for my Bluetooth issue. I have found that some people had their Bluetooth hidden from device manager and had this issue too.

I have searched this particular issue on web and I have found some threads and I tried all the following things to restore my Bluetooth:

  • I ran troubleshooting for Bluetooth, it just said that I dont have bluetooth enabled, I can try to enable it with external adapter.
  • I ran troubleshooting for Hardware and devices and it did show the "Unknown USB Device (Device Descriptor Request Failed)" issue, but didn't fix it.
  • Also, I tried to troubleshooters for network adapters and windows update but they didn't find any issues.
  • I've tried SFC /scannow and DISM.exe but they didn't find any issues.
  • I have just updated newest Windows version, and I have tried install windows again, but the issue still persists.
  • I have tried to uninstall "Unknown USB Device (Device Descriptor Request Failed)" and also uninstall my main usb driver, but that didn't fix it.
  • I installed correct Bluetooth and network adapters from Intel's site and I also tried to delete them from installer and install again, but that didn't fix it too.

-  I Installed also Intel's driver updater but that didn't solve my issue. I tried to use 3rd party dirver updaters and they didn't fix my Bluetooth and I tried to also clean my registry with CCleaner.

  • Also I tires tried to fully drain my battery and restart my laptop but even that didn't fix my issue.

Is there any other things to try or could the error be hardware related?

I apologise for any grammar errors, English isn't my native language.

Best regards,

Elias

Windows for home | Windows 10 | Devices and drivers

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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Anonymous
2019-08-28T15:04:37+00:00

Andre's reply is a bit disappointing as he thanked somebody last year for providing a solution to this issue that worked for the requester and has also just worked for me:

https://answers.microsoft.com/en-us/windows/forum/all/bluetooth-not-working-usb-device-descriptor/2af8f09f-ce33-47f8-a42a-1b55e8cf60fd

The problem is that your system is not recognising the Bluetooth chip and thinks it is unplugged and it is seeing an unknown device that is not communicating correctly.

A simplified version is as follows (I found that it was not necessary to drain the laptop battery completely):

  1. Perform a hard shut-down by holding the shift key is held down whilst selecting Windows Shut Down
  2. Ensure your computer is unplugged
  3. Hold down the power key for 93 seconds. That's 90, which is the maximum recommended elsewhere plus 3 to make sure it is over 90!
  4. Press the power key briefly to start your computer
  5. Allow it to start fully.

If you open Device Manager (e.g. right click Windows Key -> Device Manager or from the Control Panel), you should now see that the Bluetooth section has reappeared and there are no Unknown USB devices in the USB section. This means that your Bluetooth is now working again.

This apparently works by disconnecting the power (even residual power) from relevant chips which mean that they re-establish communications from scratch when you restart.

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  1. Anonymous
    2020-09-27T23:10:36+00:00

    Not all heroes wear capes.

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  2. Anonymous
    2020-09-19T21:23:42+00:00

    It worked like a charm, thanks or sharing!

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  3. Anonymous
    2020-08-14T06:37:06+00:00

    Thanks Digitiser - another grateful customer here reporting in. Like others have said I was frustrated by the endless loop of actions that never resolved anything and then I tried your method and BAM! it's fixed. This was a on a desktop rather than a laptop too. Cheers, you are a lifesaver mate

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  4. Anonymous
    2020-07-29T15:27:47+00:00

    Hey!,

    This process totally worked for me. I have a LENOVO Thinkpad x1 Carbon Windows 10.

    Thank you very much, Digitiser.

    Regards,

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