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

BenMcLean
BenMcLean Member Posts: 2 New User
edited November 2023 in 2020 Archives
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!

Answers

  • Your model uses an intel wireless network card. Have you tried to update the driver on the intel website?
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                                                     egydiocoelho Trailblazer
     
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  • StevenGen
    StevenGen ACE Posts: 12,188 Trailblazer
    edited April 2020
    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
    BenMcLean Member Posts: 2 New User
    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.
  • Probably some bug on windows. I suggest that you disable fast start up in the power options.
    Oi! Eu não sou sou a cortana! Mas estou aqui para ajudar! Hi! I'm not the cortana! But I'm here to help!
    Se você gostou da minha resposta, marque como solução clicando em sim! If you liked my answer, mark it as a solution by clicking on yes!
    Aceite somente a resposta que ajudou a solucionar o seu problema! Please accept only the response that helped to solve your problem!
    Detection tool click here to find the serial number or partnumber of your model!                                                          
                                                      
                                                     egydiocoelho Trailblazer
     
    ProductKey clique aqui para descobrir o serial do windows! click here to discover the windows serial!
    Para usuários da comunidade inglesa, espanhola, francesa e alemã, usarei o google tradutor! :)
    For users of the English, Spanish, French and German community, I will be using google translator! :) 
  • Manny-Acer_Retired
    Manny-Acer_Retired Newbie Posts: 4,453 Guru
    edited November 2020
    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
  • @Acer-MannyThe topic has not been closed.
    Oi! Eu não sou sou a cortana! Mas estou aqui para ajudar! Hi! I'm not the cortana! But I'm here to help!
    Se você gostou da minha resposta, marque como solução clicando em sim! If you liked my answer, mark it as a solution by clicking on yes!
    Aceite somente a resposta que ajudou a solucionar o seu problema! Please accept only the response that helped to solve your problem!
    Detection tool click here to find the serial number or partnumber of your model!                                                          
                                                      
                                                     egydiocoelho Trailblazer
     
    ProductKey clique aqui para descobrir o serial do windows! click here to discover the windows serial!
    Para usuários da comunidade inglesa, espanhola, francesa e alemã, usarei o google tradutor! :)
    For users of the English, Spanish, French and German community, I will be using google translator! :) 
This discussion has been closed.