HP 8200 Elite, Intel Quad Core i5 3.10 GHz, 16GB DDR3, 1TB HDD, Windows 10 Pro 64-Bit (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 What Runs It: i5 Quad Core 3.1GHz Processor What's Inside: 16GB DDR2 RAM What's Inside: 1TB Hard Drive May arrive upgraded to Windows 10 Professional as Microsoft has ended mainstream support of Windows 7