Open AirPort Utility, which is located in the Utility folder in the Applications folder. Then you have to select the base station and click Continue. Then, follow the on-screen instructions to set up the AirPort Extreme and your wireless network. On a computer, open AirPort Utility, located in Start > All Programs > AirPort. Then you have to select the base station and click Continue. After
airport utility download, follow the on-screen instructions to set up the AirPort Extreme.