HP ProOne 400 G1 AiO (Non Touchscreen) 19.5-inch Widescreen Intel® H81 chipset Win 8.1 Pro downgrade to Win7 Pro64 OS Intel Core i3-4130T Processor 4GB DDR3 500GB HDD Integrated Intel® HD Graphics HP USB Standard Keyboard HP USB Mouse Slim SuperMulti ODD Integrated Webcam & Mic 3/3/3 AiO Warranty