Am running XP on a Gateway box but lately developed a bug and would like to restore it to state that it was in when purchased (Have OEM restore disks). Would there be a problem with re-registering it or whatever you call it with MS? I know I would be missing all the updates but I have a copy of all the service packs. I have run Avast and spyware and malware programs but they do not seem to find anything. Would there be a problem restoring it? Thanks.