i forget what its called, or where i got it, but theres a program i have that monitors the start up sections of the registry and notifies me each time something tries to add itself to start on startup. it asks if i want to allow it. really quite handy
ill see if i can find it on my hdd tomorrow. im off to bed

edit: nm, was a quick find
http://www.mlin.net/StartupMonitor.shtml