Razer man o war 7.1 wired all pc audio playing through mic

my headset has started to play all of my pc audio through my microphone, I have tried messing with the sensitivity settings and I have plugged my headset into another computer and it worked, so I am wondering what it could be. it has previously worked before. I have also checked the cord and replugged it in and also reinstalled synapse. none of this has worked. please help :slightly_sad:. my pc is the razer blade. when i turn up my sensitivity a bit he can hear himself. i had a higher sensitivity than this before and it had worked fine. if i keep my sensitivity low i have to shout for them to hear me