New
#1
Those are your neighbors SSID's from their WiFi routers. You can't make them disappear as far as I know on Windows. All you can do is pretty much ignore them unless their is some third party software that performs that function. Not sure why you care, because once you've logged into your own router you shouldn't need to log in again.
I guess you COULD go door to door and ask your neighbors to set their routers to hide the SSID, but I suspect you will get some funny looks and a few unpleasant replies.