Dell OptiPlex/Intel Core 2 Duo E8400 3.0 GHz/New 4Gb Memory/160 Gb/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. THIS COMPUTER COMES WITHOUT THE OPERATING SYSTEM. The buyer will need to purchase and install his or her own Windows OS. New 4Gb Memory. New Power Cord! PACKAGE DOES NOT include monitor or keyboard/mouse.