DELL OPTIPLEX TOWER CORE 2 DUO 3.0GHz 160GB New 4GB DVDRW- Windows 7 PRO 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!. CORE 2 DUO 3.0GHz 160GB New 4GB Windows 7.