Wow! And nothing shows up in Applications? Does anything show up on the task bar, such as IE/Mozilla may be running something. Scratching head thinking on this one. I have heard of this sort of thing in the past and it seems it was virus related but some of the other guys, Bob or Kees will likely have a handle on someting like this, meanwhile will do a little research. BTW what is your OS?
My computer will be sitting idle and all of a sudden things will start playing like commercials or previews to movies or something completely abnormal. I currently have Super Anti-spyware, Avira anti-virus and Malwarebytes as my protection to try and see if one of those would kill whatever this bug seems to be. I have no clue as to what this is; it doesn't even show up on my processes or services(that I can find.) I just want whatever this issue is to be done so when I am watching a video on my laptop I don't get interrupted. If anyone has a solution on this problem please fill me in. I am new to this site, but have used this site for previous downloads and have seen this is a very active site for higher end computer knowledge.