As I see it, it seems there is a problem with a few sound cards. I did not have any issues with Soundtap with windows 10.
My friend did. One soluation was to use an " Audio Interface" the program seemed to work. Sadly no sound from the built in speakers.
But the program showed it was recording.
So I told my friend to set up external speakers. He didn't want to. Could not be bothered with a work around.
So the bottom line is this: if you have an audio interface and external speakers, you may find a soultion. The sound card via the interface is different from the one installed on a computer. Let me know if that works for you