You are picking up from a neighbor. I lived in an apartment, and neighbors in another apartment realized they were getting internet on their laptop whenever i was connected on my computer.
I too get internet service in the boonies without having any paid service. I get a wi-fi signal. Click on your Windows icon in the bottom left corner of your screen and check the "Connect to" link. It will show you how you are connected. Be sure to go into the Network and Sharing Center to block others from gaining access to your computer for your own protection. This will not prevent you from having access to the internet, but will stop others from being able to see your files, setting, etc.
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