The scanner is only a year old, XP certified. Worked great. The problem isn't with the usb or power cables. I never get that far. The software is supposed to be installed before you plug anything in. With everything unplugged, when I try to install the driver (from original cd or downloaded latest driver from visioneer) the wise installation wizard starts, then i get a box that says upgrade error, this installer is only for the 6600 scanner. that's the scanner that i'm trying to install, but it wont let me. No scanners are shown in Device Mgr, none in my Control Panel, I checked everything that Visioneer says to remove. I even went into the registry and deleted anything that said visioneer or onetouch (it's a onetouch 6600 scanner). When it works I love the scanner - it's fast, does a great job, etc. It's in perfect condition - but somewhere, some little bit of code won't let me install it. Someone PLEASE help!