Eddy
10
Is my download of avast coruppted or what?
Not likely, it looks more like a user error. Avast (and for that matter any malware removal tool) can only delete/move things if they are not in use.
If you have a NT based system (XP/2K/2K3/NT) run a boot time scan.
If you have 98(se)/ME, run a full system scan while in safe mode