This Microsoft Windows 7 Professional Operating System DVD is a great software option for those in need of an OS upgrade. The DVD format makes it easy to install, and the SP1 64 version ensures compatibility with a wide range of devices. This particular item is refurbished and does not come with a key, but its Brand, Model, Type, and For Operating Systems aspects make it a desirable option for many users. It belongs to the Computers/Tablets & Networking and Software categories, making it a must-have for those in the market for OS software.