ThinkCentre M82 (4x5 Tower) 3/3 Warranty Intel Core i5-3570 Processor 3.4GHz 6MB Cache 4GB Memory 1TB HDD Windows 8 Pro 64bit downgrade Windows 7 Pro 64bit with Windows 8 Pro 64 RDVD DVD Recordable Gigabit Ethernet Adapter Integrated Intel Graphics Integrated Audio Lenovo USB Preferred Pro Full Size Keyboard Lenovo Enhanced Optical USB Mouse Internal Mono Speaker Non-stand