Microsoft Windows 7 Ultimate 64 Bit w/SP1

Windows 7 has better ways to find and manage files, like jump lists and improved taskbar previews, to help you speed through everyday tasks. It's designed for faster and more reliable performance, so your PC just works the way you want it to. With 64-bit support, you can take full advantage of the powerful PCs. And great features like HomeGroup, Windows Media Center, and Windows Touch make new things possible.