If your notebook is a new one or relatively new it should have wireless capability. If it doesnt you will need a wireless stick to plug into usb or wireless pcmcia card to plug into the pcmcia slot.
On windows XP and Vista you can look for the wireless icon on the bottom right of your puter screen when its on. The double puter icon is the LAN (local Area Network) which is only for directly plugging in an ethernet plug. But the single puter icon if it shows is what you use to get online wirelessly. Click it once and a box should pop up. It should have two buttons on top of the box saying GENERAL and SUPPORT. And on the bottom of the box you should see
PROPERTIES, DISABLE and VIEW WIRELESS NETWORKS. Click on the VIEW WIRELESS NETWORKS. And there you can search for available networks and connect accordingly. You dont need to know your router model in order to connect , just your password as you have set up.
IF you cant get to this box by the icon, then go to START, click once and the blue box that shows should have a CONNECT TO choice, mouse over that and it should show WIRELESS NETWORK CONNECTIONS on top of SHOW ALL CONNECTIONS. YOu want to use the first one.
Try that and see if it works. Of course you need to turn ON your wireless feature as well. You will know that its OFF if the single puter icon shows a big X across it.