HP 15.6 Inch Laptop (Quad-Core AMD A8-6410 up to 2.4GHz Processor, 4GB RAM, 500GB HDD, Windows 7 Professional 64-bit OS) Stone Silver (Certified Refurbished) This Certified Refurbished product is tested & certified by HP to look and work like-new. The product includes all original accessories, and is backed by a 90-Day warranty. Windows 7 Professional, 64Bit, English. Best Operation System for Business and Home Use. Windows 8 Professional (64-bit) Media Included. AMD Quad-Core A8-6410 Processor up to 2.4GHz Frequency, 4GB DDR3 RAM (2 slots, 1 user accessible), 500GB HDD; 15.6 HD BrightView Display with WLED Backlighting 1366x768, AMD Radeon R5 Built-in Graphics; SuperMulti DVD Burner, HD Webcam with Mic, 1 USB 3.0 Port, 2 USB 2.0 Ports, 1 HDMI Port, 802.11b/g/n WiFi;