On 17/04/2012 8:46 AM, Mark Gary wrote:

I have a computer desktop thats now a few years old. It has onboard an
Intel 82801BA/BAM USB 1 controler. Because I wanted to upgrade to hi
speed, it purchased a PCI USB 2.0 controller, which the system reports
as a VIA Rev 5 or later. From the very start XP refused to recognise it
as USB 2, and I was getting the stupid message "your device can perform
faster" etc, everyting time I pluged ANY USB2 device. I did manage to
find some VIA specific drivers on the internet that appeared to fix the
problem, but only as long as I did not switch the computer off (standard
reboot does not effect it). When I perform a cold boot the VIA USB2
Enhanced Host Controler has vanished, and again I get the daft "your
device can perform faster". I now have the problem of having to
reinstall the drivers evertime I want to use my webcam, memory stick,
etc. This is driving me crazy, and obviously is not what should be
happening. Strangly, if I view hidden devices in device manager, it
still exists, but greyed out. Note that I only plug USB1 devices
(keyboard, mouse etc) into the onboard intel USB 1 ports.
Please note that the system BIOS is running latest version.

It sounds like maybe the power supply is not giving enough juice
anymore, and that it is now delaying the startup of your add-in USB
board. The startup delay causes it to fallback to a safer, more
conservative setting. That would be why the problem only occurs after
power-on, but not during a warm reboot.

Yousuf Khan