Wireless Internet Connection Not Working Because of Firewall

Ok Well See I haven't gotten a new Wireless router but I Soon will once I get my pay check. But I need to send some stuff out today and I need to use a connection I have around me.rolleyes It used to let me use it and all of a sudden It gave me a Connection is strong but it also gave me a little lock Icon that says Firewalled protected and it won't let me on to the internet even though it says I'm connected to the router. Please Help I'm easily distracted if I go to a public place to use the internet. I'm using my GF's Computer right now and have to leave in a while cause she's going to work. Thanks for the Help.