Unidentified objects/settings - where from and how to remove?

I recently bought a new pc and i havent played KC in a long time, so i bought all the expansions and started the game. from the main menu and through to the regular gameplay i have this audio setting, on the right hand side of the screen and a green “targetting circle”. I dont know where it comes from. From what i can see it isn’t a 3rd party influence, my mouse can move over it in-game and it isnt in other games.
I really hope some or just one of you guys can help me. Anyone??

I have never seen anything like that but i suspect it has something to do with your audio software.