guys pls help since updating the grapihcs driver my AV receiver gets no audio over HDMI at all.

USB Audio Device Properties
Device status:
This device cannot start. (Code 10)
{Operation Failed}
The requested operation was unsuccessful.
i tried another HDMI cable, another port, and restarting the AV receiver... in Sound settings the HDMI device doesnt even appear, and in Device Manager i dont see a high definition audio device for the GPU anymroe. it worked yesterday on teh old AOpen MZ855-II Intel VGA Driver... help? i am starting to suspect the installer did smth odd, because nothing else changed. the AV receiver itself works fine with a game console on teh next input.