I ran the trouble shooter and it said all devices are fine. I know its something simple- I hope ;)
Open your sound mixer and enable “video”. An upgrade I just installed turned mine to off, turning it back on enabled sound on vids again
I always go online first but search phrases are important. I used no sound except windows 7 alerts and this was #1 reply at duckduckgo:
The more you learn the lingo, the easier it gets.