I recieved an email which is a spam a few days ago, but I didn't see anything wrong with my computer. In order to "clean" the computer, I installed Mcafee VisrusScan 8.0 to scan the computer. However, the computer crashed the second time when I restarted the computer after VirusScan installed. So, I had to go to safe mode to restore the computer to a point before VirusScan installation. The computer was fine for a couple of days. Today, the computer crashed again, it can only start in safe mode. Even restore to an earlier point, the computer still can't start. Please help to fix the problem. Thanks!