Windows 7 Dell Optiplex 755 Tower 3.0GHz Core 2 Duo 8GB RAM 1TB WiFi Wireless PC Super Fast Refurbished Dell Optiplex Desktop Computer PC Intel Core 2 Duo 3.0Ghz Dual-Core Processor - 8GB DDR2 Memory - 1TB Hard Drive Wifi Wireless Capable Desktop Full size tower. Expandable PCI-e for Gaming! FREE BRAND NEW MOUSE AND KEYBOARD INCLUDED!!