I have my wireless network setup and working, however, on the "Available networks" screen, it says my network is unsecured, as I can also see a neighbor's network and it has a little lock and says it is secured, along with another neighbor's network that says it is unsecured and I could actually connect to it.  How do I go about securing my wireless network?

 

I have a dell and another computer.  They both have windows XP with the wirewall on.  I have a Linksys router and a Linksys PC card in the second computer.  Let me know what other information you need to help me.

 

Thanks.