Hello, I have recently been receiving a lot of phantom ad sounds on my computer. The ads will be long (30 secs or so) and then stop. They happen when I have no browsers open, or when i kill all my browser in Activity monitor they still continue.... This is one of the ad messages: "ohh my sinuses...when mucus causes sinus pressure..." Then it goes on to talk about: Maximum strength Mucinex-D. There is some dialogue between a mucus-man and someone struggling with mucus. I also get ones from Lysol sometimes. Has this ever happened to anyone else? Can I kill this in my activity monitor--if so what process name is it? If it is virus/malware, what kind of program should I run for defense? What kind of browser add-ons might stop this from occuring in the future?