Operating System Genuine Windows 7 Home Premium 64-bit, Processor and Graphics: Intel Pentium P6200 Processor 2.13 GHz, 3MB Cache, Mobile Intel HM55 Express Chipset, Mobile Intel HD Graphics with 64MB-1696MB dynamically allocated shared graphics memory; Memory: Configured with 4GB DDR3 1066MHz (max 8GB) 2 main memory slots, Both slots occupied. Storage Drive 500GB (5400 RPM) Serial ATA hard disk drive, Toshiba Hard Drive Impact Sensor (3D Sensor)