No recording device or recording channels

I have just installed Audacity 2.3.0 and am running Windows 10 Home. When I try to record I get “Error opening recording device” and I see that Audacity shows no recording devices - I’m guessing that the latter is what’s causing the error message. I’ve tried re-installing the software to no avail.

See this FAQ page in the Audacity Manual:

particularly the Windows 10 section at the top.