This feature-rich Dell OptiPlex 780 Ultra Small Form Factor PC is designed to meet your business and casual or business computing needs! This OptiPlex 780 is powered by an Intel Core 2 Duo E8400 3.0 GHz dual-core processor and 4 GB DDR3 SDRAM. The 250 GB hard drive provides room for your music, photos, and other critical data. Access CDs and DVDs with the DVD drive. The operating system is Windows Professional 32Bit. Microsoft is discontinuing offering Windows 7; this product will be installed with either Windows 7 or Windows 10. Microsoft license terms for Windows 10 will include the downgrade rights to Windows 7.