Audacity won't record any sounds.

I used to be able to record in Audacity all the time when I first got it. Then I left it alone for about, I’d say, 5 days. Since then, whenever I try to record something in Audacity, it will start recording, but for some reason it won’t detect any sounds. All it does is record silence, no matter what I do. I tried changing my recording device, my audio host, everything, and nothing is working. I even reinstalled it. Nothing seems to work. I’m on Windows 10. Please help. :question:

What are you trying to record?