Rob got an invitation to upgrade to Windows 10, it died right in the middle of the upgrade, and now he can't do anything. He tried to revert to Windows 7 but it won't work. He's heard that his RAID may be the culprit. Leo says if he can boot to his Windows 7 DVD, he should be able to format and reinstall. Leo believes that Rob's RAID array or his hard drive has likely failed. So he may have to rebuild everything.