HP Pavilion 550-016, Windows 7 Pro, Intel Core i3-4170, 1TB,HDD, Desktop PC Intel Core i3-4170 processor (3.70GHz) | 1TB 7200RPM Serial ATA hard drive 4GB PC3-12800 DDR3-1600 SDRAM memory (expandable to 16GB) Intel HD Graphics 4400 | Ultra Slim Tray SuperMulti DVD Burner | B&O Play Audio High Definition Audio with up to 5.1 surround sound capabilities | Bluetooth 4.0 and Wireless LAN 802.11b/g/n USB keyboard and optical mouse | Windows 7 Professional 64-bit