Ultra-Thin • Ultra-Light • Ultra-Tough For the average Ultrabook these attributes may sound like a contradiction, but the X1 Carbon is far above average. It features a carbon-fiber reinforced chassis and passes durability tests in extreme environments. It delivers fast, powerful and dependable performance. The X1 Carbon is the lightest 14-inch business Ultrabook on the planet – and at just 0.74 inches thin, it’s extremely portable. Comes loaded with Windows 10 Professional 64 Bit. These units are 100% functional. They have been tested, cleaned and installed with a New Genuine Windows 10 Professional 64 Bit Operating System. There may be some very minor cosmetic blemishes which in no way hinder the use or functionality of this stunning, cutting-edge X1 Carbon Ultrabook.