Examples: Monday, today, last week, Mar 26, 3/26/04

This page has been archived.

The content on this page may be out-of-date or have been superseded by newer information, and links on this page to other sites may not work. This page has been archived for future reference.

Visit our Product Forums for more current content.

Register to get all the benefits of being a member! Get social and introduce yourself in our Welcome Forum, or learn about our ACE Program and What's Happening at Acer.

S7-392 Windows 8.1 Clean Install Unknown USB Device (Device Descriptor Request Failed)

mjschugmjschug Posts: 2Member

Hey Everyone,


I did a clean install of Windows 8.1 with our 8.1 Enterprise ISO.  I installed all the drivers available from Acer's support site.  However I noticed that I have an Unknown USB Device listed under Universal Serial Bus controllers in Device Manager.  The device Hardware ID from properties shows USB\DEVICE_DESCRIPTOR_FAILURE.


Anyone else have this issue from a clean install of Windows 8.1?



  • DebDansDebDans Posts: 6Member

    I sure did my multi USB port was not found and my DVD player through USB. A firm ware update fixed the DVD. The usb multi port adaptor  regesters as unkown but does work. Strange but true

  • mjschugmjschug Posts: 2Member

    Interesting, however i have yet to connect my CP adapter to the laptop since the Clean install of 8.1 - Still haven't figured out extactly what this is...




  • SofaRiderSofaRider Posts: 6Member

    Device Manager listing of USB Controllers on my S7-392-9890 upgraded from Win8 Home to Win8.1 Pro


    Universal Serial Bus controllers
      Generic USB Hub
      Intel(R) 8 Series USB Enhanced Host Controller #1 - 9C26
      Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft)
      USB Composite Device
      USB Root Hub
      USB Root Hub (xHCI)

  • andyliangandyliang Posts: 1Member

    Also got same problems not gracefully solved, by forcing Win8 to use Intel drivers for Win7:

    /en/home/leaving?target=http%3A%2F%2Fplugable.com%2F2012%2F12%2F01%2Fwindows-8-and-intel-usb-3-0-host-controllers" class="Popup


    Noticed in Device manager, used "View"  "devices by connections", if a USB 2.0 hub/device was connected to "USB enhanced host controllers" (ie. USB 2.0) would make the "unknown usb device" to work properly.


    But in most cases, USB 2.0 devices/hubs would connect under "USB 3.0 extensible host controller" , even if a USB 2.0 device/hub was in fact being connected to a USB 2.0 host controller/hub.

  • DebDansDebDans Posts: 6Member

    Hi Andyliang Thanks for trying to help. But computer said not compatableb with that software. I decided to return the USB hub for another brand, a name brand this time hoping that will work. Belkin will have teck support.

  • ThomACEThomACE Posts: 12Member

    I'm planning a clean install of 8.1 from my ISO-file on my Acer Aspire V7. This because my batterylife degraded from 5hours of heavy use to 2hours max after the update to 8.1.

    How did you do this clean install? 

    Does the S7 also have an SSD-cache? Did it work afterwards? Or did you have to install other drivers?
    Did you make a back-up of all your files before the clean install?

This discussion has been closed.

Who's Online145

+140 Guests

Join in, share your experience!

It looks like you're new here. If you want to get involved, click one of these buttons!


Maintenance Notice:

The Acer Community Maintenance has ended! We apologize for the delay and would like to thank everyone for their patience. We're still ironing out some details but you're more than welcome to explore! Stay tuned to the Announcements section as we'll be updating it regularly to keep you informed about the changes.

New Here?

New to Acer Community?

Register to get all the benefits of being a member! Get social and introduce yourself in our Welcome Forum, or learn about our ACE Program and What's Happening at Acer.

Member Highlight

Look at ven98 go! Raising up the ranks, helping other users in the Predator forums. Thank you for your dedication!

Total Posts and Comments: 760

Total Points:147

Total Accepted Answers: 0