Static problem with external mic, but no internal

Hello all,
I recently got the Plantronics Gamecon 367 headset, and it turns out my laptop had some issues with microphones, so after spending total of about one day trying to get laptop to recognize my micophone, which it finally did, I now have a new issue.
Whenever I use the headset to talk, I have static sound, however, I use my in build microphone, sound is pure as crisp (it wasn't before, hence the reason for buying a new headset). I have check my headset on different computer, and it's fine, but on my laptop I have static sound. My soundcard is realtek.

Any help would be much appreciated
 
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