computer connects to internet

Hi people,
This is an easy one. My computer dials up my server without my directions. It is really very annoying. I have dial up service which is adequate for me. I have shut down all of the automatic updates and don't know where to look for the errant program. I have used task manager to track at start-up but didn't see which program is doing it. Please don't tell me to shut down all of the programs and start them one-by-one!
Is there an easy way of fixing this?