This is set on your wireless router. If you have a wireless card on your computer go into the properties of your connection. Your wirelss connection should show it is secure (padlock icon). If it is connected properly then the WEP has already been entered. If it is not connected you need to go to the properties of the connection and enter the WEP. If you do not have the WEP you need to get it from the wireless router configuration page. Getting that information depends on what router you are using. Please provide more details. Thanks.