I have a hp pavilion 15- e039tx laptop with two graphic cards with switchable graphics :
1. Intel HD Graphics 4000
2. Radeon (TM) HD 8670M
After I updated to windows 8.1, there were driver updates available for both of my drivers in windows update. First was from Intel and other from Advanced Micro Drivers..(something)... After i updated my driver configure switchable graphics option which appeared below AMD CCC option disappeared and games like COD Ghost which worked fine before started lagging.
Is it possible that windows update installed wrong driver for graphic card. I also read that switchable graphics are either dynamic or fixed type (mine is dynamic type I think) , is it possible that windows installed driver for fixed type switchable graphics.
Thank You for reading such a long post and pls reply if you have a solution in mind.