Model :Lenovo ThinkCentre M77 SFF - Small Form Factor Operating System Info :NO OPERATING SYSTEM. THIS COMPUTER COMES WITHOUT THE OPERATING SYSTEM. The buyer will need to purchase and install his or her own Windows OS. Processor :Athlon II X4 645 @ 3.10 GHz Memory Installed :12 GB DDR3 Hard Drive :500GB Optical Drive :DVD-Combo Chasis : Dimensions : 13.30" high x 3.90" wide x 14.50" deep System Weight : 16.50 lbs Warranty : 365 days

Model :Lenovo ThinkCentre M77 SFF - Small Form Factor Operating System Info :NO OPERATING SYSTEM. THIS COMPUTER COMES WITHOUT THE OPERATING SYSTEM. The buyer will need to purchase and install his or her own Windows OS. Processor :Athlon II X4 645 @ 3.10 GHz Memory Installed :12 GB DDR3 Hard Drive :500GB Optical Drive :DVD-Combo Chasis : Dimensions : 13.30" high x 3.90" wide x 14.50" deep System Weight : 16.50 lbs Warranty : 365 days