Moe's computer running Windows 7 keeps shutting down on him. Leo says that with the age of Moe's computer, the hard drive is getting unreliable. It's time to backup his hard drive and then swap it out for a new one and reinstall Windows. It may be enough just to reinstall Windows, though. Leo does this every year as "spring cleaning." It keeps it more reliable. So he should try that first. He should backup his Documents and Settings folder to get his data. Then he can format that old hard drive and reinstall Windows.