HP TOWER 400G9-BASEUNITIDSI / I5-101B6CORES / 8GB / 512 SSD / WINDOWS 11 PROFESSIONA 64BIT DOWNGRADE WINDOWS 10 PROFESSIONAL 64BIT / 1YEAR WARRANTY / 320 KEYBOARD / 125 MOUSE / ELECTRONIC TCO CERTIFIED LABELING / ISE OVERRIDE / NO FRONT OPTION / SEA AND RAIL