The Compaq Presario CQ57-339WM laptop is an ideal portable computer that you can use at home or in your business. It is packed with useful features, equipped with Windows 7, and has a powerful processor and supporting hardware that all result in a high-performing computer. This model of the Presario has a display measuring 15.6 inches, making it a large enough notebook to use comfortably. It is still portable, however, at less than 6 pounds.This 64-bit laptop is made to be efficient, allowing you to run multiple functions at once without the system crashing or freezing up. The CPU in the Compaq Presario CQ57 is the dual-core Intel Celeron Processor B800 that runs at a clock speed of 1.5 GHz. There is 2MB of L3 cache memory, which helps to make your frequently used programs run faster. Rather than having a separate GPU, the Presario comes with Intel HD Graphics that will support games and high definition video easily. The 2GB of installed DDR3 RAM has a bus speed of 1333 MHz, and you can add memory up to a total of 8GB. All of these components work together to support the speed and efficiency of the Presario and ensure a solid performance no matter what you are doing. With a 320GB hard drive, there is plenty of space to store documents, software, games, and more. The Compaq Presario CQ57 uses Windows, which is both user-friendly and familiar to most people. The current operating system installed is Microsoft Windows 7 Home Premium 64-bit Edition which has numerous applications for work but is equally good for personal use.In addition to the HD Graphics integrated into the CPU, the designers at Compaq added additional features to ensure you have an excellent viewing experience. The 15.6-inch screen has an LED-backlit LCD display. The widescreen image aspect ratio is 16:9 and has a 1366 by 768 resolution. Watch videos, play games, and work on photo editing in beautiful high definition on this laptop. An additional feature of the Compaq CQ57 is a lithium-ion battery that will last up to five hours on a full charge. It also comes with an AC Adapter for easy charging. There is a full-size keyboard with a separate number pad, making data entry and typing comfortable and efficient, even for long periods. It supports IEEE 802.11b, IEEE 802.11g, and IEEE 802.11n to ensure an efficient wireless local area network connection. With three USB ports, a VGA connection, and LAN connection, you can hook up all your favorite accessories and peripherals. Compaq laptops are high-quality computers that will last for many years. With this model, you can enjoy a fast laptop that is powerful and has plenty of storage for both work and personal use. Watch your favorite shows in beautiful high definition, and stay connected when you are on the go.