For years I've used the microphone in my webcam, but it quit working about 2 weeks ago so I bought a microphone. I can't get it to work either. I guess it's something lower in the system. How do I diagnose what the problem is. The speakers work.
Fixed! Thank you so much. I would never have known to do that. Microsoft should not change things like that silently on an update. I'm,a relatively sophisticated user but I didn't know about that and hadn't chosen it. One of my two issues was Movie Maker and it was not on the list. This video fixes MM for any who are having sound problems with it: