HP Elite Pro Slim Small Form Factor Desktop (Intel Quad Core i5 3.1GHz, 8GB DDR3 RAM, 1TB HDD, DVD RW, Windows Professional) (Certified Refurbished) Windows Professional 64-bit English (activation code sticker included on desktop case). Microsoft is discontinuing Windows 7. This product comes with Windows 7 or Windows 10 Windows Professional 64-bit English (activation code sticker included on desktop case). Microsoft is discontinuing Windows 7. This product comes with Windows 7 or Windows 10 Slim Form Factor Desktop with 13.3" x 4" x 14.9" dimension. Powerful Intel Core i5-2400 3.1GHz, Huge 8GB RAM and 1TB HDD. Great system for your business and office use. Comes with Keyboard and Mouse. 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 Intel Quad Core i5-2400 (6MB Cache, Quad-Core, Base Frequency 3.1 GHz, up to 3.4 GHz Turbo Speed),8 GB DDR3L Memory, Support up to 16 GB RAM, 1 TB 7200 RPM Hard Drive,