Lenovo G550 15.6-Inch Black Laptop - Up to 3.8 Hours of Battery Life (Windows 7 Home Premium) 2.1GHz Intel Core 2 Duo Processor 4GB (204-Pin) DDR3 SO-DIMM Memory 250GB 5400RPM Serial ATA Hard Drive, DVDRW Drive 15.6" (1366x768) 16:9 LED Display, Intel GMA 4500M Graphics Windows 7 Home Premium 64-bit, Up to 3.8 Hours of Battery Life