I'm getting ready to sell my old laptop, I need to clean it off before I sell it. Any tips on cleaning it off? It is running XP, I have another machine (running vista) that I have reset to factory condition but I cant seem to do that with this machine. I have transferred/deleted the "my documents" folders and removed most programs (still has Office and Anti Virus on it). I do not have XP disc or I would just wipe it out and reload it. Any computer experts out there?