Windows 7 is valid for both 32 and 64 bit versions.

Windows 7 makes the things you do every day easier. With fewer clicks, faster searching, easier browsing, and simpler ways to connect, there's less between you and what you want to do. Windows 7 is designed to improve the performance of your PC, so it's faster, more secure, and more reliable.

PCs with Windows 7 simply work the way you want them to work.