Auto-update

I seem to have given permission, at some point, for some program to auto-update, without checking for permission. I don't much mind that, unless the process starts interfering with my own websurfing, which this one has begun to do. Is there any way for me to identify which program it is and revoke the permission?

Warranties

I complained, some time ago, about being harassed by telephone solicitors concerning the (nonexistent) warranty on my (nonexistent) vehicle. carbonelle advised me that, by waiting to the end of the call, I could signal my desire not to be further bothered. (The specific signal was "Press 2".)

I have now followed her advice. Three times. (Once it was "Press 9", but I take that as the moral equivalent.)