Lenovo ThinkCentre all in one PC with Windows 10 Pro. Intel I5-4590 at 3.0 Ghz processor. 12 Gig Ram. 500 Gig Samsung SDD hard drive. 20" screen, built in speakers and webcam. Windows 10 Pro activated with BIOS key. Lenovo keyboard and mouse are included. Great machine for daily web browsing, email, etc.