This computer has been refurbished by a Microsoft Authorized Refurbisher. It includes an Original Genuine Licensed Windows XP Operating System with Rovery CD from a Microsoft Authorized Refurbisher. SUPER FAST DELL Optiplex Pentium 4 3.0 GHz computer system ready to use. This UPGRADED DELL includes: 1 Gigabytes of DDR Ram Memory, a 40 GB Hard Drive, Fast CD Optical Drive, loaded with great software. It is ready for any Cable/DSL internet connection. Also included FREE: Scrolling Mouse, Keyboard.