hey, my mother has a dell dimension 2400 2.4ghz celeron late last summer her dell crashed windows had major error and knocked out the pc's hardware for about 3 minutes. the pc reboots and windows repaired itself and the hardware accept for the USB. I told XP pro to give back the drivers to the 4 usb ports, later its working great..... however though it had reslapped the usb ports to version 1.1 . My mother lost the drivers for the dell dimension 2400 in clutterd up room..... I say screw it and I'll fix it later, well I orderd scanner for her PC and it will be here tomorrow at 3:45pm I have until 7:15am tomorrow to fix the usb problem and get it back to version 2.0 if not the scanner will not function at all..... newegg.com and my cousin told me it will not run at all if it doesn't have the right juice to power it up. also this scanner is a brand new CANON canoscan. any help would be good. thanks