Lenovo Thinkcentre M78 Small Business Desktop (AMD Dual Core A4 up to 3.6GHz Processor) 8GB DDR3 RAM, 500GB HDD, DVD, USB 3.0, Gigabit Ethernet, Windows 7 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 AMD Dual Core A4 up to 3.6GHz Processor 8GB DDR3 RAM, 500GB HDD DVD, USB 3.0, Gigabit Ethernet Windows 7 Professional