i just installed call of duty modern warfare, and singleplayer works just fine, but multiplayer crash's, i have searched for fix's to this issue, but none work, i have tried enabling stereo mix, but i can't find it, i enabled show disabled devices and still no stereo mix, i tried plugging in a headset and that does not work, my vid-card drivers are up-to-date, my realtek HD audio can't get anymore up-to-date, puck buster is installed and up-to-date, and i have installed this game and played it, in the past, so what is going on?