This solution does NOT work.
Works for me!
I turn off my PC every night, as I sleep in the same room. Then in the morning I turn it on, it has NO sounds whatsoever, so I do the Ease of access "shaman dance" fix, with a small silent prayer to the Windows OS Gods, and audio -- both output, as well as input - then works, 100% surely and repeatably.
So, not a fluke fix but a stable one, at least for me.
What other solution did you find that seems to work for you, please? OR did you not ever get any working fix at all?
Are you sure your issue is the same as mine and the one of some others here in this thread?
Your issue may be another, in which case your comments here are NOT appreciated - start your own thread, if so, and get your own help that applies to your issue.
Please note the restarting of Windows Audio service is only needed if you turn on your PC, but then step away from it for some minutes.
If you do not step away and do the Ease of access thing at once when boot-up finishes, then the Services tinkering is not needed.