Microsoft Windows 7 Home Premium (32- or 64-bit) (Upgrade from XP or Vista) DVD

Windows 7 Home Premium (32- or 64-bit) (Upgrade from XP or Vista) DVD from Microsoft is the long-awaited successor to the ubiquitous Windows Vista operating system. Building upon Vista's impressive feature set, Windows 7 adds many features which simplify the way you use your PC, as well as the way that your PC connects to the world.