|The old owners manual may have it in there. If you don't have it then download it. There are sometimes ways to create disks, while other let you press an F key at boot to recover system and some others have a way to order them online for a small amount.|
I doubt that files is a virus.
You can also borrow anyone's xp cd (best if same service pack level but not absolute) then boot to cd and run repair. See microsoft's site for how to repair or use sfc.exe to fix xp.
"The era of big government is over," said Clinton 1996