Windows 7: Can't install driver for HD 6520G

I recently reinstalled Windows 7 and I had to install all my drivers. Both my gpu's were listed in device manager as standard vga graphics adapter.

I tried installing the driver from the Acer website, but that only installed the driver for the HD 7470M. This was the same for the drivers from the AMD website.

I also tried the auto detect app from the AMD website and that detects my CPU and integrated 6520G, but when I try to install the driver, no display driver is installed.

I tried to uninstall the driver for the 7470M so only the 6520G was listed in device manager, but the result was the same.

I don't know what else I could do, so any help is welcome

Edit: I also reported this to Acer and AMD and Acer says they can't do anything because I changed the OS from Home Premium to Ultimate...



AMD hasn't responded yet.

Edit 2: amd says Acer should provide all the drivers. So now I'm stuck and reverting back to home premium.