I don't have a headset, so I will not have some options you probably will. Is this headset a combination with the microphone attached?
But right clicking the speaker icon will allow you to select playback devices. On that dialog is a communications tab, maybe something there will help.
If it doesn't, do you have another sound mixer utility installed, like on my system, I have a Realtek mixer in addition to the basic Windows one. If you do, perhaps something there.