If your thinking of upgrading your PC from Windows Xp or Vista to Windows 7, you might use this software called Windows 7 upgrade advisor. It will diagnose your hardware and see if it’s fit for Windows 7. The funny thing is when you check the website, you’ll see the supported OS to run the advisor. The OSs is Windows XP, Windows Vista, and Windows 7. Wait a minute. Windows 7? Are you kidding me? Now, why on earth I’m running Windows 7 Upgrade Advisor, when I’m using Windows 7? Can somebody explain? Any Microsoft employees reading this? Okay, maybe you want to DOWNgrade from 7 To XP.