DELL OPTIPLEX CORE 2 DUO 1.8 GHz, 160GB, New 4GB, DVD/CDRW, WINDOWS 7-(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. 4 GB RAM 160 GB Hard Drive DUAL CORE 2 DUO 2.4 GHz Processor. WINDOWS 7.