When I use my mic on the laptop, it works fine. (has the single mic/audio combo port). However, when I plug it into my desktop (which has 2 ports sound and mic) it says "Line 2" and wont allow me to speak. Does anyone know a fix?
Whatever mic you have, set it as default device and default communication device in the sound settings. Turn off "Line 2".
Go to the Steam settings>voice and make sure that it has your microphone selected.
Test your microphone by pressing on that button or go in-game and write "voice_loopback 1" in the console. Speak, if you hear yourself then it works obviously.