I installed Windows 10 earlier today and am since struggling to get my HD 7800 working properly. It is shown in the device manager, however with a little yellow exclamation mark, the driver version is 15.200.1062.1002 and when I try to update the driver, it tells me that the newest driver is installed (which is correct, I guess). But when I start Windows, it always gives me an error which is "No AMD graphics driver is installed, or the AMD driver is not functioning properly. Please install the AMD driver appropriate for your amd hardware.". I should note, that I tried reinstalling the driver several times, including deleting anything to do with AMD and reinstalling. Nothing has worked.
I'm hoping, someone knows what to do or has a similar problem.