Windows 7 Professional, Dell 760 Optiplex Desktop Computer, Featuring Intel's Powerful & Efficient 3.0GHz Dual Core CPU Processor, 750GB Ultra Fast 7200 RPM SATA hard drive, CDRW/DVD SATA Ultra Speed Drive, 4GB DDR2 Dual Interlaced High Performance Memory, Providing Power for Today or Future Needs, Wireless Capable (Adapter Sold Separately)