I went to play Call of Duty (which i've done many times) but this time i started getting an alarm which sound like German police car-- is this a firewall alarm and someone is trying to break into my computer. Once I leave the game the alarm stops after about 30 seconds. In my firewall settings i have an exseption for CoD Which should allow Packets to pass. Now I'm only guessing about the Firewall being the cause. It could be little green men blowing trumphets in my machine as well.