Hmm, I can't find anything in the cmd window using ipconfig, but it may have been my sisters laptop. She connects wirelessly to my router, i think she's off it now so I'll see if the messages stop. Once I find out what it is and if it's nothing to be concerned over, I'll just ignore it.
ZoneAlarm reports to have blocked 4 access attempts since it was installed, 4 of which were high-rated. All displayed the same message, and happened today in the space of like 10 minutes.