My computer shuts down during a McAfee Full Scan at 28-30% completion, and then is difficult to reboot. This only occurs during the Full Scan (Quick Scan is fine, and detects nothing), and also occurs when I try running it in Safe Mode. I contacted McAfee Technical Support. A technician took remote access of my computer and said a Windows file is preventing the scan from completing, and suggested I contact Microsoft. I have no idea what file it is choking on, though, because the computer shuts down too fast to see which one it is. Please advise.