I can't install Windows XP Service Pack 1. I tried downloading the 133 MB file and installing from there first. Didn't work. It started to, but then it just stopped and gave me this error. I also tried doing it from windows update, same thing happened. What's the deal? And YES, I did BUY it (not corporate, etc.). Also, after the first time I tried and got the error, I restarted and remember it saying "invalid boot file: booting from C:\Windows\boot.ini" or something very similar to that. I haven't had any problems since then... but maybe that has something to do with this? ARGH....