Lenovo ThinkPad T520 Notebook PC - Intel Core i5-2520M 2.5GHz 4GB 320GB Windows 10 Professional (Certified Refurbished) This Certified Refurbished product is tested & certified to look and work like new by a Microsoft Authorized Refurbisher. The product includes accessories, and is backed by a 1 year warranty. Intel Core i5-2520M 2.5GHz Processor 4GB DDR3 - 320GB SATA Hard Drive 15.6-inch HD Anti-Glare LED Backlit Display (1366 x 768) Windows 10 Professional (64-Bit)