Audio Not Working After Windows 10 Version 2004 Update

The following worked for me... in an Administrator elevated command prompt:

• net localgroup Administrators /add networkservice
• net localgroup Administrators /add localservice
• exit Reboot.  Restored all my sound.

I have the same issue and nothing is working to resolve the "no sound" problem with Windows 10 upgrade

Fixed it FINALLY.

I think what did the trick was using PNPUTIL to delete ALL drivers related to Realtek Audio (you have to go through all the oemXXX.inf files and remove them one by one).

Steps:

1. Go to Device manager
2. Under "Sound video and game controllers"
3. Right click on your Realtek Audio device, uninstall device, check box to remove files
4. Uninstall Realtek audio drivers from Programs/Files if you can find it in there
5. Start type "cmd"
6. Right click on "cmd" and "Run as Administrator"
7. Type "pnputil /enum-drivers"
8. Copy the results to notepad (easier to do the next step, you can highlight the output, left click which copies to clipboard automatically, and paste into notepad).
9. Then ctrt+f "Realtek" in notepad, and find every driver related to Realtek.
10. Type "pnputil /delete-driver oem#.inf /uninstall /force" where oem# is the associated inf for the realtek driver (make sure its the audio ones). There are about 10 to remove, so you can press Up to bring back the previously typed command, and just edit the OEM file number.
11. Once done, reboot.
12. You'll notice your device is now disabled (sound should show red x)
13. Go to device manager, right click, scan for updates
14. Should see the realtek device show up.
15. I right clicked on the device, Update Driver, Search computer automatically, then Search for updated drivers on windows update

Then somehow this fixed it..

I tried a million other things to no avail, so you may have try those other things in conjunction with this, but try the above if you haven't succeeded with other methods!

Hi I had problems with internal speaker not working on dell 9010. I just grabbed iso of win 10 ver 1909 and used Rufus app to make usb install and all is fixed. Win 10 2004 is no good and caused me a headache. Hope this helps everyone else with same issues.. cant believe it as I thought its gd to grab Latest version but I now know better. All the best. Hope they fix this with next release. Never had these issues before with Windows updates.

I solved it by uninstalling the device. Removing all realtek driver folder and program .. folders. Then when I 're booted the machine the generic windows audio driver got installed.