I have the same question. I've not changed anything network wise in a year and my internet connection is working (I have it now), yet I just received the New Network Found message. What network and why now?
I see how to add it and at the moment this is the first message for me. I see the network address looks reasonable, but could this be a hacker trying to gain access to my computer?
Why is za finding a new network now and how do I figure out what the network is that I'm being asked to grant access to?
Looks like several others have the same question. Not how, but why.