I have a big problem. I was going through the suggestions that you sent and went to update Wondows Security. I was downloading MS Service Pack 2 from MS website. It stopped during the first one, so I cancelled it and downloaded it again. No problem. It said to restart my computer. So I did. And now XP won't work. Error message says that \windows\system32\config\system is missing or corrupt. It said to use the disk to reinstall but the disk isn't working either. What happened?