Realtek has nothing to do with HDMI out audio.
re install your old drivers.
Reinstalled still no sound.
but.... without the system recognising SPEAKERS in the output options, nothing with sound will work.
"speakers" is a system handler, that handles all sound, even if audio is being outputted by another device.
in the list of audio output options "speakers is missing"
this suggests that a rogue app deleted the *.dll that is needed, or erased a registry entry or two.![]()