No Sound on Win 10

I am using Win 10 and have downloaded Audacity twice and there is no sound. My pc is a Lenovo Thinkcenter. After much work, I think I have removed Audacity. I tried soundtrap and it will record so I think the audio is OK.
Used Audacity on Win 95 with no problems and display looks same. Anyone know how to get the streaming audio to record? I really liked Audacity.

The hard part is not recording in Audacity. The hard part is recording streaming audio. That gets harder each Windows version.

Also see: Voicemeeter.