Lenovo TINY ThinkCentre M72E Intel Core i3 3220T 2.8GHz 4GB Memory 500GB Hard drive Intel HD Graphics Intel Wireless-N, built-in Wi-Fi Windows 7 Pro 64bit with authenticty sticker Genuine power supply Each computer has Windows 7 freshly installed, with all the necessary drivers.  Units are in excellent cosmetic condition, with very minor signs of use.