Microsoft Windows 7 Ultimate

With Microsoft Windows 7 Operating System Software Ultimate, you'll be able to run many Windows XP productivity programs in Windows XP mode* and recover your data easily with automatic back-ups to your home or business network. You'll be able to connect to company networks easily and more...(click for more.)

Features:

(Includes 32 & 64-bit versions) Combines remarkable ease-of-use with the entertainment features of Home Premium and the business capabilities of Professional--get it all with with Windows 7 Ultimate
Make the things you do every day easier with improved desktop navigation; start programs faster and more easily, and quickly find the documents you use most often
Run many Windows XP productivity programs in Windows XP Mode; watch, pause, rewind, and record TV on your PC
Easily create a home network and connect your PCs to a printer with HomeGroup; connect to company networks easily and more securely with Domain Join