Vista - USB Devices not recognized!

[Vista - USB Devices not recognized!]

I tried turning off the machine (hard power down, ouch!) and then unplugging it for a few minutes. ONce I restored power the USB ports read my keyboard and mouse again.

Still looking for help on how to keep this from happening on each reboot though!

[Vista - USB Devices not recognized!]

We just installed Vista on our new Dell desktop and shortly the Microsoft wireless mouse / keyboard stopped functioning. Found out there were incompatibility issues so I downloaded the update for it.

That caused the USB port to stop recognizing the devices.

Switched back to a wired version (Dell keyboard, IBM mouse) which only worked until I rebooted. Then the ports they were in stopped functioning (device not recognized) even though those devices had working drivers that WERE fine before the reboot.

Now when I turn off the computer and back on - no keyboard or mouse to use anywhere. All ports disabled.

HELP!