HP 19.5" All in One Desktop Computer (Intel Celeron 2.41 GHz Processor, 4GB DDR3 RAM, 500GB HDD, DVDRW, 19.5 Inch HD+ Backlit Display, WiFi, Windows 8/10 Professional)(Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com 19.5 Inch HD+ 1600x900 LED Backlit Display (Non-Touch), Intel Dual Core Celeron J1800 2.41 GHz up to 2.58 GHz, 4GB DDR3-1600MHz RAM, 500GB 7200 RPM HDD; Slim-tray SuperMulti DVD Burner, 10/100/1000Base-T Ethernet, 802.11b/g/n Wireless LAN, Webcam, Memory Card Reader, 3 USB 2.0, 1 USB 3.0. Windows 8 Professional included. Free uprade/ downgrade to Windows 10 Professional or Windows 7 Professional at your choice.