We keep getting this error: "Wireless Network Connection doesn't have a valid IP Configuration." Does anyone know what that mean and how can it be resolved? Thank you.

If you have tried to portforward on your router remove the gaming application.
On your routers gateway go to Connections and find your computer by IP or Name.
Delete your computer off the list and on your Windows7 PC connect again with your password if or not

Thanks. Do you know where to find this router gateway on a laptop?