right i have connected my router to my old laptop and now have that all sorted and connected to the internet ( was a piece of piss

)
turnt on my new laptop and turned the wi-fi on and it has picked up the router and im connected to the internet,so far so good
but it has also picked up 2 other wireless connections that are security enabled

WTF is that all about,lol?
the connection im using is defo my router as it says its my belkin,lol. but it says its an unsercured connection
so my question is how do i make it a sercure one that only i can access?
dont really want to network the 2 laptops together,just share the BB internet
any ideas?