PH517-51-72How to fix bluetooth turned into "Unknown USB Device (Device Descriptor Request Failed)"?

I use an Acer Predator Helios 500 PH517-51-72NU 17.3" Gaming Laptop. (Windows 10, heavily upgraded with more RAM and storage) Today, while I was in the middle of working, my Bluetooth trackball just stopped working. I tried rebooting the PC to no avail. I tried installing all the drivers for my model from the Acer site, starting with the Bluetooth one. Nothing. Windows says my PC isn't Bluetooth capable and where there used to be the Bluetooth device in Device Manager, now I see "Unknown USB Device (Device Descriptor Request Failed)"

I have tried uninstalling that and rebooting the PC. It just comes back as unknown. I think this might have been caused by a new Windows 10 update. I have tried all the obvious stuff. Help!

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Commodore_1995#

Your model uses an intel wireless network card. Have you tried to update the driver on the intel website?

StevenGen

Firstly, press the F3 key only or the Fn+F3 keys together, see if the BT activates? If not, uninstall the BT driver completely from Device Manager and reinstall the latest BT driver which is the Killer, Bluetooth Driver, dated 2018/05/21 and version 20.20.0. It might also be wise to uninstall your Wireless LAN Driver and install the latest Killer driver dated 2018/05/21 and version 1.5.1805 too. After you have installed either the BT or both WiFi and BT see if the WiFi and BT is activated and working? If its not, then press the F3 key only or the Fn+F3 keys together so that it activates, which is a thing that allot of people don't know and/or don't read the instruction manual of how to activate a disconnected BT/WiFi.

BenMcLean

I re-installed Windows but that did nothing. Then I went to sleep.

When I woke up, it was fixed, like nothing ever happened. Why.

Well at least it works now.

Commodore_1995#

Probably some bug on windows. I suggest that you disable fast start up in the power options.

Manny-Acer_Retired

Image: https://us.v-cdn.net/6029997/uploads/editor/in/akcgf35ndr6q.png

Hi all, you can try the steps shared by a user above, if you still having issues please contact your local support for better assistance: http://www.acer.com/worldwide/support/

Note: The topic will be closed.

Thanks,
Acer-Manny