This HP Pavilion a6537c Desktop PC provides the power and performance you need to handle your multitasking needs!This Pavilion a6537c is powered by an Intel Core 2 Duo E7200 2.53 GHz processor and 4 GB of DDR2 SDRAM. The 640 GB SATA hard drive satisfies the need for large amounts of storage providing plenty of space for music, games, photos, and other critical data. Also, Microsoft Windows Vista Home Premium comes pre-installed!The built-in front panel memory card reader enables you to access up to 15 of the most popular memory cards so there's no need to purchase an external card reader! The Pavilion a6537c features an HP Pocket Media Drive Bay so you can add a portable external hard drive by simply sliding the drive into the PC like a cartridge!Access CD and DVD media, backup up to 8.5 GB of data onto a single DL disc, and burn CDs and DVDs with ease with the DVD±RW DL drive with LightScribe technology. A keyboard and mouse are also included. Just add a monitor and get ready to compute!