Nevermind. I have found the solution to my problems. Let me explain the whole thing:
I use teamspeak 3 for VOIP when in games. I'm using my own TS3 server.
The problem I had, was that sounds within windows, when playing music, games and videos got toned down by 80% when someone was talking in Teamspeak, I tried to change the windows settings to not change anything when using communication software, though nothing go changed. I checked the teamspeak 3 client, and found out that the TS3 client itself has an option in the "plugins" where the client takes control. uncheck this option and everything will work perfectly.
Open TS3 - settings - plugins - uncheck "volume control" and close the window.