I have the initial boot disks for this computer so I just reloaded everything from scratch, you lose everything you have saved though, I was 1/2 way through the final chapter of the game Throne of Baal, dammit. If you have a good antivirus program it might beable to cure your machine without this. Becareful about antispy ware you find free on the web, some of it actually infects your computer even worse to try and make you buy a product. This computer contains nothing important so if needed I can just start over. The other computer, that is used for bills and such alternates Macafee and Norton antivirus scans every otherday.