The WEP is a security password that protects one Wireless Network Connection. If the Connection belongs to you, then you are the one who has to invent a password for it. If you got a new Internet Service, then the password is most likely to be underneath the router, or among the documentation your new Provider sent you. If you want to connect to a friend or neighbour WIFI, then you need to ask them for the password. You are not going to find the password anywhere on the computer, since passwords are encrypted and you need at least have entered it once.