I own a Acer Aspire V3-551G-X419. This laptop comes with 2 graphics cards: (1)AMD Radeon HD 7660G (2) 7670M. The computer came with an older version of the catalyst control center, which allowed me to disable one of the graphics cards (the AMD Radeon HD 7660G), and then when I updated the catalyst control center, it removed the ability to re-enable the first graphics card. Now I don't know how to re-enable it. Please help?