Okay, open the command prompt
Start (windows button) -> type in prompt (run box) cmd -> ipconfig
That will give you your IPv4 address, your subnet mask, and local gateway.
You want your local gateway to match the router you are using. If you have wireless, it's usually 192.168.0.1 or 192.168.1.1 but it's easily changed to a 10.x.x.x or 172.16.x.x or 192.168.x.x address