Lenovo ThinkPad Edge E531 688528U 15.6" LED Notebook - Intel Core i7 2.20 GHz - Matte Black Intel Core i7-3632QM Processor (6M Cache, up to 3.20 GHz) BGA 4 GB PC3-12800 DDR3L SDRAM 1600MHz SODIMM Memory 500GB, 7200RPM Serial ATA 2.5" Hard Drive 15.6" HD WXGA (1366 X 768) LED Backlight w/ 720p HD Camera Windows 7 Professional 64 - English (Downgraded from Genuine Windows 8 Professional)