I definitely stand by an earlier post (at least, I think I've posted this before): Norton Internet Security must die!
Sadly I don't own this computer, or I would be ceremoniously scrubbing the areas of the disk which it occupied and burning the box.
The damn thing is a little child - it needs to be constantly patted on the head and reassured that it's doing the right thing. No, I don't want arbitrary eDonkey users trying to connect to this computer on port 4662 - not that I care, since I'm not running eDonkey, or anything else on that port.
If I say Block, I damn well mean it.