I hope that this doesn't sound like another advertisement...it isn't met to be. The program that schoolgirl mentions works just like the old "Hard Drive Mechanic" program. It got my laptop booted up and allowed me to reformat and reinstall XP Pro. I wasn't able to get by the files corruption screen otherwise. Dirt cheap to buy too! I have to admit though, it's basically just another boot disc. You can save yourself time and a few bucks just by making a reboot disc off your PC while it's running correctly and before you have a problem.