Sounds of an advertisement start playing in the background in Windows 10. I just can't shut it off. When I am watching a video, or playing music or skyping, I hear other sounds (from an advertisement, from the sound of it). I hear it even if I have no internet browser running. I can't understand where I can shut that process from. It is really disturbing and I hear it unexpectedly. When I open my volume mixer it seems to be coming from WindowsFormsApplication1.