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

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): Perform a hard shut-down by holding the shift key is held down whilst selecting Windows Shut Down Ensure your computer is unplugged 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! Press the power key briefly to start your computer 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.

Nice!! you saved my back there, worked like a charm... thank you

I thought this weird ritual wasn't gonna work. But it works! 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): Perform a hard shut-down by holding the shift key is held down whilst selecting Windows Shut Down Ensure your computer is unplugged 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! Press the power key briefly to start your computer 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.

digitiser - Thank you, I have a Dell Inspiron 15 and this issue popped up after a year without it. I have been scouring the forums for a fix. Yours worked and it was simple. NOW maybe Microsoft could fix the bug created. Semper Fi!

This solved my problem! Basically hard rebooted by disconnecting all the cables from my laptop (even the charging cable) and pressing down on the power button until it fully turned off. Then after turning it on again - Bluetooth works!

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

Anonymous

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

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.

0 comments

Answer accepted by question author

Anonymous

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):

Perform a hard shut-down by holding the shift key is held down whilst selecting Windows Shut Down
Ensure your computer is unplugged
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!
Press the power key briefly to start your computer
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.

0 comments

50 additional answers

Anonymous

2021-01-26T16:04:50+00:00

Nice!! you saved my back there, worked like a charm... thank you
Was this answer helpful?

0 comments No comments
Anonymous

2021-01-14T18:08:58+00:00
I thought this weird ritual wasn't gonna work. But it works!
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):

Perform a hard shut-down by holding the shift key is held down whilst selecting Windows Shut Down

Ensure your computer is unplugged

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!

Press the power key briefly to start your computer

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.
Was this answer helpful?

0 comments No comments
Anonymous

2021-01-10T14:37:18+00:00

digitiser -

Thank you, I have a Dell Inspiron 15 and this issue popped up after a year without it. I have been scouring the forums for a fix. Yours worked and it was simple. NOW maybe Microsoft could fix the bug created.

Semper Fi!
Was this answer helpful?

0 comments No comments
Anonymous

2020-12-09T12:52:12+00:00

This solved my problem! Basically hard rebooted by disconnecting all the cables from my laptop (even the charging cable) and pressing down on the power button until it fully turned off. Then after turning it on again - Bluetooth works!
Was this answer helpful?

0 comments No comments