Yeah, Werewolf...ME was/is evil! It almost gave me a nervous breakdown!
WOM, you may be right there about your situation. It's definitely better to just back up what you can and wipe your drive clean and do a clean install.
My laptop had XP 'factory' installed and after loving XP I bought an XP CD for my Desktop and wiped my HD clean and XP has made my Desktop puter better than it ever was (and I bought it about 3 years ago from Dell).