If using XP and Vista, those files will be automatically
replaced. Windows doesn't like you to fiddle with their files, so
like a virus, they will automatically replicate. That's the only
thing they learnt from virus creators and put into good use. You
can delete them from desktop or wherever you drag them to.
Windows 2000 and below... although Windows tries to protect them,
but they failed in a lot of ways. You need to move those files
manually back and not delete them.
