I seem to have the same issue previously discussed here, however my recent history is filled with it and only a few varying port numbers. I have no other devices plugged in aside from my laptop adapter and three regular speaker jacks (5.1 system). I'm not sure if I should be worried as it only states "Info" and "Detected", but the history is made continuously and most within the same minute.
I read elsewhere that I could check my router for UPnP settings but why would that be filling my history up? 