HP Desktop Core 2 Duo 3.00GHZ 4GB 1TB DVD Windows 7 PRO 64 Bit 19" LCD Core 2 Duo 3.00GHZ 4GB 1TB DVD Windows 7 PRO 64 Bit 19" LCD (Brand May Vary) This product is sold with either Windows 7, upgradable to windows 10 90 Days Warranty