Lenovo Thinkpad T520. Great handy laptop for all your computing needs. It comes with Windows 7 base image installed. It features an i5 dual core processor, 4GB RAM, 320 GB HD, 1366x768 Resolution on a 15" screen. There are also outputs for VGA and DVI monitor connections. It also supports Bluetooth 3.0 and 802.11a/b/g/n wireless connectivity. All at a light 5.5lbs, this computer is great for all your needs.