Done multiple virus scans with Norton, scanned with ad-aware SE, spybot s&d, re-upgraded the xp pro install. For some reason, Yahoo Instant Messenger, MSN Messenger, Internet Explorer, and Hijackthis, all crash immediately when opened, and give me that stupid blahblahblah has caused a problem and needs to close. I haven't recently installed or changed anything. I have done 2 system restores, and all attempts to un-install, re-install these programs has failed with the install wizard closing due to some insane problem. What the hell? Anyone have any suggestions?