LENOVO DESKTOP - J115 - 1 - ATHLON 64 X2 - 3600 - 1.9 GHZ - 1 GB - 1 - 250 GB - DVD +/- - W101823 Operating System: Vista Home Premium Mouse: Optical Wheel Mouse (400 dpi) Keyboard: Enhanced Performance 104-key preferred pro USB Mouse: Optical Wheel Mouse (400 dpi)