The Dell Precision T5500 desktop PC delivers powerhouse computing that's ideal for everyone. The Dell Precision T5500 comes with a Intel Xeon Quad Core 2200 MHz processor, and the Genuine Windows 7 Professional 64 Bit Operating System along with word document, spreadsheet application & a shortcut to Microsoft Free virus protection. This desktop computer also includes 12288 of DDR3 memory, a 320Gig Serial ATA hard drive, DVD ROM optical drive and a NEW keyboard / mouse. This desktop comes fully loaded with Microsoft Windows 7 Professional 64 Bit! This package will arrive with a restore partition and has been recently restored with Windows so you will be the first to use it. The restore partition will allow you to restore your computer back to the original state of purchase at any time and prevent expensive trips to the computer repair shop. This desktop has also been updated with a list of additional programs to compliment Microsoft Windows 7 Professional 64 Bit. Included is a Microsoft compatible Office program which provides word processing, spreadsheets, presentations, graphics, database software and more. It also comes with a shortcut to Microsofts Free Anti-Virus program along with Windows Media Player, Internet Explorer (Internet Browser), DVD viewing software and many other great Windows programs and features. Buy this and you can Get Free Shipping on a Dell Precision T5500 2.26GHz Xeon Quad 12GB 320GB Quadro 5000 Gaming Computer - Refurbished for $507.99.