The most common cause of this is having another AV installed or remnants of one on your system.
Have (or did) you another AV installed in this system, if so what was it and how did you get rid of it ?
What other security based software do you have, anti-spyware, etc. ?
What surprises me is your having 6 providers running, to my thinking if avast isn't running then it shouldn't be possible for all the providers to be running.