One of the cool things about Windows Vista is that, if you have an installation DVD for Vista Home Basic, Home Premium, Business, or Ultimate, you can use it to install any of those editions — which one you get just depends on which product key you enter at the beginning of the installation. For some reason, Microsoft took this cool tidbit away from Windows 7. The disc you get only lets you install one edition.
However, there’s an easy way to turn such a “locked” disc into a disc that will install any edition again, just like with Windows Vista.