Microphone not picking up any sound.

I use Windows 8.1.So on my PC the sound is being weird,firstly,my headset is recognized as speakers, secondly, the microphone isn't picking up any sound (I use a headset with a microphone). When i plug it in, it gets recognized as microphone, but if i speak, no matter the sound, or boost level, it doesnt pick up any sound. Tested the microphone on Win 8.1 laptop works perfectly, on my Win 8.1 PC is the issue.

Is the problem with drivers? or any ideas?

System Spec's are needed to really try and help you.