I assume you mean you want to encrypt the WiFi using WEP? Do a Google search with your exact model and find (on the Belkin website) the User Manual. It will tell you exactly how to install the encryption on your Belkin using a cable LAN connection. Then install the same WEP key on your computer - the first time you try to connect a XP dialogue box will appear and you insert the WEP key there. Use an unusual WEP key so no one can guess it - for example 56 3a 4b 91 5f (numbers 1-9, letters a - f). XP will remember your key so you shouldn't need to enter it everytime. But do keep a secure copy for when you forget it!