Many USB Devices are "Unknown Device" in Device Manager

Many USB Devices are "Unknown Device" in Device Manager

Post by QSBM » Tue, 09 Jan 2007 13:28:01


Hello-

All of a sudden a few days ago, many of my USB devices started showing as
Unknown Devices in the Device Manager. I've read that this sometimes happens
in WinXP too- but no post that I found about the problem proposed a solution
(for Vista or XP.) If I disable the "Standard Enhanced PC to USB Host
Controller", the system then locates drivers for all of the devices, but runs
them in USB 1.1 (slow!) mode.

I'm seeing this for flash storage devices (thumb drives, flash card readers,
ipod), logitech quickcam 5000, plantronics USB headset etc. Oddly, my MS
Intellimouse Explorer 3.0 and APC UPS work fine!

Anyone know what to do?
I have a ton of USB devices defined in the registry under
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Enum\USB\ , but regedit does not
allow me to remove any of these.

I also unfortunately don't have a System Restore Point to back when my USB
devices were working.

If anyone has ideas for something to try, please post! Thanks, Al
 
 
 

Many USB Devices are "Unknown Device" in Device Manager

Post by Troy McClu » Wed, 10 Jan 2007 03:59:00

ControlSet002? thats a backup. you should be looking in currentcontrolset to
see whats loaded and being used

 
 
 

Many USB Devices are "Unknown Device" in Device Manager

Post by QSBM » Wed, 31 Jan 2007 08:50:00

Today's automatic updates fixed my USB problem. It must have been KB925528:

"Install this update to resolve reliability issues with some USB hardware
devices and controllers."

Thanks MS, now I can remove this PCI USB 2 card from my system! AL
 
 
 

Many USB Devices are "Unknown Device" in Device Manager

Post by Hugh Wyn G » Thu, 01 Feb 2007 08:33:33

Did you get the one for compatibility issues for a wide range of
applications many of which I've already installed?

--------------------------------------------------------------------


The Windows Vista Application Compatibility Update
Article ID : 929427
Last Review : January 30, 2007
Revision : 2.0

SUMMARY
The Windows Vista Application Compatibility Update is a package of
software updates that address common application compatibility issues
in Windows Vista. When you try to install and run certain legacy games
or applications in Windows Vista, you may experience one or more of the
following symptoms:
The game or application may not be installed correctly.
The game or application may cause system instability.
The primary functions of the game or application may not work
correctly.

This update improves support in Windows Vista for the following
applications:

[ ... long list ... including things I have installed ]


----------------------------------------------------------------------