Windows 10 Home, Version 1803, OS Build 17134.523. ASUS X542U-SH71-CB.
I got the same thing all of a sudden. When I went on YouTube, it said "Audio renderer error. Please restart your computer." I couldn't hear any audio from anything else on my computer either, even though I turned up the speaker volume. I tried plugging in
and unplugging my headphones several times, but still no audio.
This is the first time that this happened for me. The only thing I did out of the ordinary recently is that I started up Skype through Start Menu > Apps > Skype (I don't usually use it). Not sure if related.
Restarting the Audio Service fixed the audio problem for me. Task Manager > Services > Audiosrv > right click > Restart.