Lenovo G550 15.6-Inch Black Laptop - Up to 3.8 Hours of Battery Life (Windows 7 Home Premium) 2.0GHz Intel Pentium Dual Core T4300 Processor (800 MHz System Bus, 1 MB L3 cache) 4 GB PC3-8500 1066 MHz DDR3 Non Parity Dual Channel Memory, Two 204-pin SO Dimm Sockets 250GB 5400RPM Serial ATA Hard Drive, DVDRW Drive 15.6" WXGA (1366x768) 16:9 LED TFT Display, Intel GMA 4500M Graphics Windows 7 Home Premium 64-bit, Up to 3.8 Hours of Battery Life