I just reinstalled my computer with windows 7 64bit and I have HP pavilion dv7 6050ec with two graphic cards : mobility radeon HD 6770M and a generic Intel HD Graphics Family. Since I reinstalled the computer, I no longer have to option to chose what graphic card I want to use. Before this reinstallation I could just right click on the desktop and there was a option that said Switch Graphical units, but now there is nothing like that. And I have the latest drivers for both graphic cards and latest Catalyst Control Center and Direct X installed. And in device manager all drivers are installed correctly. So I have no idea what to do.