I can't add a password for my WiFi?

[gregory]

In my experience the only way to add a password to a wireless network is to go under the router settings via the IP address in the url. So first you type your ip address in your URL. You will then be prompted to enter a username and password to access your router settings. You can google the default password of your router, which is different for every brand. Typically it is something like username: admin password: password. Once in the network settings you can go to security and add a password.