[Windows 10][Audacity 3.1.3] Microphone not recording.

I bought a new microphone, which includes a USB adapter.

The computer seems to recognize that the microphone is there. At least, the microphone drop-down menu has “USB PnP Sound Device”.

But when I press record, it doesn’t pick up any sound.

Hmm… you could try changing your MME/DirectSound/WASAPI host.