I have 2 things that may work.
1. Right click the speaker icon on the taskbar, press recording devices, click on the microphone that your headset is using, then press properties. Go to levels, and try turning it down, then try.
2. Move your headset microphone farther away. Sometimes, the headphones on the headset can be close to the microphone, thus picking up extra noise.
Please tell me this works, if it does, make sure to pick it as a solution!
~Warrior of Cats