Dell OptiPlex/Core 2 Duo E8400 @ 3.00 GHz/New 8GB DDR2 / 500GB HDD/DVD-RW/WINDOWS 7 PRO (Certified Refurbished) This certified reconditioned product is tested and certified by the manufacturer or by a third-party seller to look and work like new, with some signs of wear. The reconditioning process includes functionality testing, inspection and repackaging. Windows 7 Professional Core 2 Duo E8400 @ 3.00 GHz ,500GB HDD, NEW 8 GB DDR2 PACKAGE DOES NOT include monitor or keyboard/mouse