You bunch of c.roaches at Catylist.
Have you ever heard of testing??
It took me 1 hour to figure out that the "amd-catalyst-15.7.1-with-dotnet45-win7-64bit" driver contains a HDMI audio fault.
Solution is to uninstall completly and reinstall in custom mode, under the options untick HDMI audio.
Retrieving data ...