i have a dell desktop running xpmce. i think something happened to the usb drivers because the keyboard and mouse won't work. the keyboard will work when the pc posts, but once windows loads up it won't. i almost positive that its a driver problem and the pc has no ps2 ports to plug in a k/m. also the pc is password protected so i cant log on at all. is there anything i can do to reinstall the drives for the usb?