I think my laptop got hit with a virus. The screen display sometimes diffuces, sometimes goes into jittery, unreadable patterns. It is often very difficult to get Windows XP Pro running, and it takes a long time to start it. However, sometimes it comes up and stays up for many hours. In the first case this happened, I loaded Norton AntiVirus 2004 and ran a virus check on the entire system and it repaired about 100 files. I ran it again an all files on the hard drive seem to be clean. Virus definitions are the latest. But it hasn't stopped the funky display and booting problems. Could it be in the registry and it is not checked by anti-virus software. If so, are there any tools to repair the registry to stop this from happening again? Any other ideas fo0r me to repair my laptop? Thank you.