if you have mcafee or norton then do a virus scan if not you might want to get a virus protection program. Then scan using ad-aware and spybot S&D to scan fro spyware and delete those files. Now you should also clear your internet temp files and set the browser cache to a lower level by going opening internet explorer goto tools<internet options<delete files then delete cookies then click settings goto amount of diskspace used and lower down to about anywhere from 80-200.
Now if you are not familiar with p2p programs then look in progam files for names like bit torrent, kazaa, emule, edonkey, gnutella, limewire, k-lite, bearshare. I would uninstall these programs becuase your son might be downloading illegal material. Now just look through your son's folders for anything like movies(.avi,.mpg,.wmv,.vob files),
music(.mp3,.wav,.asf,.mp4) and others that you think shouldnt be there.
Now that you have done all that you might want to set an admin password so you can select what your son is able to do on the computer. Then when comes out update to windows xp sp2 which has better security options that are easy to use.
hope this helps and if you need help setting the admin password you have to ask some one else.
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Nearly a Posting Virtuoso
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