Seeing we're on computer problems - anyone have any idea as to what's wrong with mine...

Every day or three when I go to connect to the internet, my settings have been changed from "Always dial a connection" to "Never dial a connection". I fix the problem via Control Panel and it's OK for a while, then buggers up again. Not a huge problem, but frustrating.

I have Vet Anti-Virus, Pest Patrol, Ad-aware and Spybot and run them all on a daily basis. Aside from the occasional tracking cookie, they find nothing. Any thoughts?

P.S. I just ran the test that Roger suggested (PCPitstop) and it seemed to think everything was fine...