HP ProOne 600 G1 AiO NT K1T28AW 21.5" (1920x1080) / Intel Core i5-4590S (3GHz) / 4GB RAM DDR3 (1600MHz) / 500GB HDD (7200RPM) / Intel HD Graphics 4600 / DVD-RW / Win 8.1 Pro downgr. to Win7 Pro64