Lenovo Thinkpad T420 (Intel Core i5-2520M, 4GB, 320GB, Win 7 Pro) (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. Please let us know if you have any problem with the warranty within 90 days. Intel Core Intel Core i5-2520M Processor 14" HD (1366 X 768) Display 4 GB memory/ 320 HDD Windows 7 Professional 64 - English