Comes with Windows® 7 Starter already installedProcessor speed:Intel® Atom™ 1.66 GHz, Level 2 cache 512 KB, 667 MHz FSBRAM: 1 GB DDR3 (1 x 1024 MB)you can install additional ram up to 1 GB DDR3 memoryMemory Slots: 1 user accessible memory slotInternal Hard drive: 250 GB SATA Hard Disk Drive 7200 rpmDisplay resolution: 1024 x 600Graphics: Intel Media Accelerator 3150 (shared) (up to 256 MB)Expansion slots: Multi-in-1 integrated Digital Media Reader for Secure Digital cards, MultiMedia cards, Memory Stick, Memory Stick ProMedia: Webcam with integrated digital microphoneInput devicesPointing device: Touch Pad with dedicated vertical Scroll Up/DownKeyboard: 93% Full size keyboardCommunications: Network interface, Integrated 10/100BASE-T Ethernet LANWLAN: 802.11 b/g/nProduct weight: 1.3 kgDimensions (W x D x H)26.79 x 19.07 x 2.28-3.2 cmPower: 40 W AC Power AdapterBattery Type: 6-Cell (55WHr) Lithium-Ion