The HP DC7900 desktop PC delivers powerhouse computing thats ideal for everyone. The HP DC7900 comes with a Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz processor, and the Genuine Windows 7 Professional 32 Bit Operating System Only. This desktop computer also includes 2048mb of DDR2 memory, a 160Gig Serial ATA hard drive, DVD ROM optical drive and a NEW standard keyboard / mouse. This desktop comes fully loaded with Microsoft Windows 7 Professional 32 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.