The Dell OptiPlex 755 desktop PC delivers powerhouse computing that's ideal for everyone. The Dell OptiPlex 755 comes with a Intel Core 2 Duo 2.20 GHz processor and a New Genuine Windows 7 Professional Operating System Disk. This desktop computer also includes 2GB of DDR2 memory, an 80GB Serial ATA hard drive, DVD ROM optical drive and a keyboard / mouse. With the Small Form Factor design, the Dell OptiPlex 755 refurbished desktop PC will save valuable space while enabling you to be extremely productive. This desktop comes fully loaded with Microsoft Windows 7 Professional and will arrive preloaded with Windows so you will be the first to use it. The provided Original Microsoft Installation Disk will allow you to restore your computer at any time and prevent expensive trips to the computer repair shop.