Recording via WASAPI stopped working

OK, so firstly so as not to waste folks’ time, I have searched the forum for this (or similar) issue, and none of the fixes suggested have solved so far.

I have been using Audacity for a couple of weeks, no issues when recording webpages via WASAPI (I have been recording old TV and Radio broadcasts from archives)
Today it just stopped working. Will not start recording in this configuration.
I even uninstalled and downloaded again

Windows 10 Home Edition 1909 build 18363.815
Audacity version 2.3.3
Host: Windows WASAPI
Recording: Speakers (loopback)
sound activated recording not enabled

Any advice appreciated