The Dell Refurbished OptiPlex 755 PC offers energy-efficient performance, stability and choice in a mainstream business desktop. This PC offers remote management tools that help simplify upgrades, security, power consumption and even fix problems.Windows 10 Professional 64bit.4GB Memory, 250GB Hard Drive, DVDRW.Intel GMA 3100.Refurbished.18 Month Warranty.1 x LAN (Gigabit Ethernet), 8 x USB 2.0, 1 x VGA, 1 x audio line-in/microphone, 1 x audio line-out, 1 x headphones, microphone, 1 x parallel, 1 x serial.Intel Core 2 Duo 2.3 GHz Processor