I am facing a quite weird issue from past few months - unable to switch graphic card. I have Radeon HD 7670M as a switchable graphics in my HP Pavilion G6 2009 TX. The problem arose when I installed Catalyst Control App version 15.x. After installation, there was no option for switch graphics in right click menu - so I had to uninstall it. Luckily, I had a restore point which restored all the default settings, but with a problem. Now it shows those two options, but it doesn't load the catalyst control center. I waited for 30 minutes and there was no sign of it.
Now my computer is stuck at Intel Graphics and forced to use it in games giving horrible FPS. I have tried installing 12.x and 14.x drivers but it is not working at all. I don't know why AMD has not put the link to old drivers, if the new drivers don't support the older graphic cards. It seems my card is only working for catalyst control center 3.0.859.0 If anyone has it, please share it.