Navigate via Cotrol Panel to Network Connections.
There should be a wireless icon - Right Click on it
Select View Available Wireless Networks (I can see four at home - one mine and three my neighbours)
Connect to the one belonging to your house.
The wireless device in your machine needs to be told which wireless network to connect to. You are not solving an Internet connection problem but a local network issue.
Good luck...
Peccavi
April 2009