The lappy needs to be configured for your ISP...If you post who you are with here, we can direct you to the correct page.
The format is roughly (depending on ISP)
Open control panel on the lappy, double click Internet properties. Here you will find the configuration page.
If you are using wireles, you will need the WEP / WPA key that you entered when you first set up the router / Modem
Without ISP, there is little else we can say at the moment.