How do i get my encryption code so i can add

typically you goto your routers web interface through your browser and login with your password (if you didnt set one check your owners manual on the default sometimes its left empty or it could be admin or password)and goto the security page and it should display your key (of course its not going to break it down in plain english for you in form of a passphrase. it will be encrypted) then generally you can use that to get your other computers to connect.

If you dont know the address to your router there are a couple common ones. usually
http://192.168.2.1 or http://192.168.1.1 once in a blue moon http://192.168.254.254 will work or you can goto start---run---cmd and when that calls up type ipconfig /all and find your default network adapter and find default gateway and thats the address or find the IP address and change the last set of #s to a 1