Dell Optiplex 990 Mini-Tower Computer, Intel Core i7 3.4 GHz up to 3.8GHz, 8GB DDR3 Memory, 1TB HDD, WiFi, Windows 10 Pro (Certified Refurbished) This Certified Refurbished product is tested and certified by the manufacturer or by a third-party refurbisher to look and work like new,with limited to no signs of wear.The refurbishing process includes functionality testing,inspection,reconditioning and repackaging.The product ships with all relevant accessories,a minimum 90-day warranty,and may arrive in a generic white or brown box.Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon. New 1TB HDD with 2 Year Warranty From Manufacturer. What's in The Box? Refurbished Dell OptiPlex 990 Tower with Power Cable, New USB Keyboard and Mouse Software Installed? New Installation of Windows 10 Pro 64-bit.