- You cannot add "Lenovo Think Book 15 Core i5 | 1035G1 (1.0 GHz up to 3.60 GHz 6m Cache) |10th Generation | 4GB DDR4 RAM | 1TB HDD | 15.6" FHD Screen | DOS (Mineral Gray Color) 1 Year International Warranty " to the cart because the product is out of stock.