Windows 10 No Audio Output Device is Installed Problem

This is a fix to the “No Audio Output Device is Installed Problem” which occurs after a Windows Update.

I’m not the only one to have this problem (mine is on an Intel NUC8i7HNB machine). Of course, the Windows Troubleshooter didn’t help at all. The solution is

First open a Powershell prompt as Admin and ran the following commands.

net localgroup Administrators /add localservice

net localgroup Administrators /add networkservice

Restart the Windows Audio service in services.msc and audio is back!

It appears windows Update removes the service accounts from the Administrators groups and never puts them back.