Audio Not Working After Windows 10 Version 2004 Update

I have found a workaround solution. As to my understanding they screwed something with how audio works, the Windows audio is running with local service's permission, and it doesn't have something it needs.

you have 2 options to make it work.

method 1: (i don't think it's the best option)

Run as administrator a cmd window

type: net localgroup Administrators /add localservice

Restart

this command gives your ntsystem/local service "user" administrator rights, your audio will work, but every service will have administrative rights wich runs with this user.

method 2:

log in with an account who has administrator rights

open services.msc

search for windows audio service

right click->properties

on the log on panel, choose Local System account

ApplyRestart

after theese steps, the audio works fine for me.

Hello together,

it works! Thank you for the solution.

start cmd as administrator

·         net localgroup Administrators /add networkservice

·         net localgroup Administrators /add localservice

·         exit

Reboot.  Restored all my sound.

OS is german, therefore I had to replace administrators with administratoren ;-)

Still - the only way that I have found that fixes this issue is to start with a clean OS of windows or by ditching the **** OS alltogether and going to Mac or Linux. Microsoft is a garbage company that offers no support these days. Ditch this program now or forever be left in the dark - Raspberry Pi's work better than these dumpster fires.

I came here looking for solutions to the same problem. I managed to fix the issue on my laptop doing the following.

1. windows+r  then type devmgmt.msc to open device manager
2. find "Sound, Video and Game controllers" and right click uninstall audio device (for me it was Realtek).
3. downloaded latest audio driver from realtek here Realtek Audio Drivers corresponding to my OS (64 bit windows)
4. restart computer 
5. ran Realteks driver installer, it tried to uninstall driver again and i let it, computer restarted again
6. now when I booted up sound was working and installer tried to finish installation which failed and audio was gone again
7. went back to device manager via "Win+R" "devmgmt.msc and clicked "Scan for hardware changes" under the action menu. 

After this final step my audio device showed up and driver was installed again and sound is working again

As much as I would love to blame Windows update, I think it may be the Realtek Drivers that are causing the issue... I have multiple workstations that have not updated to 2004 and are still without sound. Realtek are the people we should be reaching out to.