Is there a program that can erase eveything on a computer harddrive exept the basic operating system?

essentially just do away with all down loaded stuff and get all germs cleared (and no i wouldn’t have viruses.im just building a point) we have xp

Eraser 5.8.7 have it 4shared.com.(right click and remove free space).
CCleaner.could also do this kind of task for you personally get it file hippo.com…

No.If ough want your clean put in u gets a system called deban http://www.dban.org/.It worked personally.