ThinkCentre M83, 3/3 Warranty, Intel Core i5-4670 Processor, 6MB Cache, 4GB Memory, 1TB HDD, Windows 8 Pro 64bit DownGrade Windows 7 Pro 64bit with Windows 8 Pro 64 RDVD and License, RAMBO_W7, INTEGRATED VIDEO, Integrated Audio, Lenovo USB Preferred Pro Full Size Keyboard, Lenovo Enhanced Optical USB Mouse, Internal Mono Speaker