I've used McAfee VirusScan for years and haven't had a problem. But when McAfee stopped supporting my version, I made the big mistake of buying this nightmare of an upgrade. The install was fine, but then it crashed and crashed some more. Then I said, "I'll just uninstall it and everything will be fine"... WRONG! It would not uninstall! I even tried a forced uninstall... no luck! I finally had to go through a grueling 80 step process to manually uninstall this software. Do yourself a favor and do not buy this!