Outlook keeps “installing”; won’t repair

For about 7-10 days, Outlook 2002 has been acting awful odd- every time it gets opened, it acts as if you just installed it- going through the “preparing Outlook for use” dialog, etc. Can still send/receive mail- but I cannot update it nor can I repair or reinstall Outlook- or Office 2002 Pro for that matter. I ran a reg scan and it came up clean and I ran 2 different virus scans (McAfee and Panda online)- no dice there. Short of making pst’s and then uninstall/reinstall- ideas? I have all Office 2002 updates less the junk mail update- which, ironically enough, is when I ran into this issue.