I have a Dell Dimension 9100. Today during normal operations, I got the blue screen failure in windows. After a reboot, the computer would not come up. It was failing at the mup.sys. I think this was due to a conflict with some devices. Anyway, during my troubleshooting, I was able to get the computer to boot, but now I think my USB controller is off or disabled. I have no connectivity with my mouse or keyboard. I have no serial connections available, only usb. How the heck do I interface with the computer to turn that controller back on?
 
Thanks!