CRAP! SUCK! Well that failed... After I told Automatic Updates to install sp2, and after it was done installing, it restarted my pc. At this point, I thought all was well. But then, instead of bootig normally, a screen pops up and tells me Windows failed to boot. I choose "Start Windows normally," but that does nothing; it just goes back to the same screen. When I started in safe mode, it gave me the option to use System Restore. I took that offer, since I had created a System Restore Point right before I installed sp2. The Restore worked, so I am now sitting happily at my sp1 computer, and I don't plan to try again until I absolutely must. So my final advice: If you are going to try to install sp2, either back up your hard drive or use System Restore. It could save your pc.