Router won't let wireless laptop access net

Hi! I'm new here so bare with me.

My router is not letting my laptop connect to the net, wireless connection. It was fine before, it says its able to see the router but can't access farther than that. I have a desktop(vista) connected and is able to net.

Honestly I was out of the room when my laptop restarted thinking that windows up dated and thats when the problem started.

Please can you help me? Thank you in advance!