One day last week when turning on the computer I got a message that said windows was being shut down to prevent damage. I rebooted and have not seen the screen since however, Windows (XP) takes as long as 3-5 minutes to load. I added RAM in August so there is 640mb. Hard drive I have approx. 15gb used and approx 41gb free space. It ran great until that error came up. I have run 3 spyware programs and a virus check. All come up clean. I did a disk defrag as well as a disk clean up. I have emptied temp file folders and prefetch. I have tried system restore to 4 or 5 different restore dates and each one takes extremely long, the system restarts and when I log on it tells me that the system was unable to be restored to the selected date. I have also made sure that I have all updates installed. I am sure I am missing something but not being too knowledgable in this area is preventing me from finding the fix. I appreciate any suggestions.