You have to manually update the drivers, using Device Manager => Update drivers.
When you tried to install the drivers, the drivers file is expanded to C:\AMD\Support\...., C: being your system drive.
When you use Device Manager to update drivers, please choose "Let me choose the drivers" option and show the path to the drivers file, usually C:\AMD\Support\....\Packages\Drivers\Display\. Please check include subfolders option, too.
Thank you kind sir, this helped!
I'm eternaly grateful really.