Audio Not Working After Windows 10 Version 2004 Update

I had a refurbished Dell Optiplex 990 that I had totally erased to sell.  I bought a clean install of Windows 10 Pro, Version 1909 ($99).   I still have no sound on the PC.  I have tried every driver I could find with no results.  Any ideas? There has to be a compatible driver because version 1909 worked well.

I went thru this too for almost 5 weeks until I finally found a solution . It seems to be in the drivers . with the help of everyone here , I was able to reload the standard default drivers and it worked . may not on yours but look into the default  Real Tek / IDT drivers .. Thats what I did ..

Having the same issue here, and it's driving me insane.

HP Zbook 15u G6 Here.

Windows 10 2004.

Tried pretty much every single thing in this thread and nothing worked.

Microsoft, you f*cking suck.

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!

Very Good Advice