How do I connect my laptop to the internet?

I have a a wireless network already setup in my home and my other toshiba laptop hooks up to this fine. I have a dell inpiron 8500 and i just gave it a fresh install of windows now i dont know how to find a new connection. I go to network connections and i only find a wired one, which is o f no help. If anybody can help me out it would be much appreciated