Yeah, I don't want to stop it from coming up, I just want to know if there's a harmless reason it might come up even though I haven't done anything to prompt it.
Also, I just checked my firewall and anti-virus logs, nothing suspicious there.
Update: I installed SP3 (thanks Underlord!) and after that the WFP hasn't whined anymore. I even restarted once more after installing SP3 just to see if it would pop up again, but it didn't. *prays that it will stay that way* Also, good news is that SP3 didn't screw up my pc - nothing that I can see so far at least.
Anyway, thank you to everyone who helped.