Dell OptiPlex/Core 2 Duo E8400 @ 3.00 GHz/New 8GB Memory/250GB HDD/DVD-RW/No OS - (Certified Reconditioned). 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! New Power Cord. THIS COMPUTER COMES WITHOUT THE OPERATING SYSTEM. The buyer will need to purchase and install his or her own Windows OS! PACKAGE DOES NOT include monitor or keyboard/mouse!