Yesterday, I cleaned up and defragged my computer. It worked fine when I was done. When I tried to use it later that morning, the programs wouldn't respond and the computer froze up. I shut it down manually and restarted. I couldn't get past the windows logo screen even after multiple tries. I tried just about every F8 boot up option. I tried repairing twice and reinstalling, and I found that if I just left the computer on, it would eventually boot up. It takes about an hour to get to the full desktop. I originally thought it was a video problem because I got the "black screen of death" when the computer rebooted after the repairs and reinstall. After the repair, I was getting a bunch of "explorer needs to close" errors, but those were gone after the reinstall. It functions, but extremely slowly. I would appreciate any suggestions. Thanks!