I have same issue, twice!
One time early 2021 and i did the rollback by windows restore point, solved!
And now (4 weeks ago) after windows 10 update (version 21h1) i cant do the rollback (no valid restore point available...)
Now my Acer VN7-592G has no sound again... not fixed yet!
I've tried some procedures:
- Reinstall drivers ( old by Acer and newer by newest Acer's and Realtek );
- Check Audio services and RPC service.. all ok, running;
- Fixed MMAudio regedit permissions...
- Fixed ConsoleSecurity registry entry... in my case the values was there, but i do...
- Update drivers with Driver booster...
- Did latests Windows 10 updates (this week)...
Anyone has other procedure to solve this problem ?