Upgrade your system with this Toshiba notebook. This notebook utilizes Windows XP as its operating system, which is already installed on the PSCBLU-01L003 laptop. Windows XP provides several additional features that may be useful. The OS, as well as numerous other computer functionalities, are installed and stored within the 6144 MB of installed RAM that comes with this notebook. The Satellite C855-S5350 model has a mercury silver exterior, and includes integrated/on-board graphics, which helps to deliver fantastic picture quality at less heat than dedicated graphic cards. View everything you do in 720P HD with the 15.6 inch LED display. This display also has backlit functionality for more clarity. What's more, the entire system is powered with a processor that runs at 2400 MHz, eliminating any slowdown that might typically occur. A built-in microphone and two USB 2.0 ports are also included.