You can enter the default address into the address bar (usually 192.168.1.1) or it's on the bottom or sides of the router.
Once you enter the address you will get a login screen where you'll put the default user name and password (found in the user manual) or found on the netgear web site and go to the security tab and set the password using WEP,WPA or WPA2 to make an encrypted security key. You would then write down the security key and put it someplace , then save the changes and exit.
1)Open the web browser that you use: Firefox,Google Chrome,IE,or Opera and type in the IP address for your router,and press the Enter key. http://www.routeripaddress.com/< Router ip addresses can be found here
2)A window will open and then type in your routers default username and password,and press the Enter key again http://www.routerpasswords.com/< Router usernames and passwords found here
3)Navigate to the Wireless Security\Network Security Settings Tab and open it to locate or change your WEP or WPA Security Passphrase. Use WPA because it provides better security.
4)Write this Security Passphrase down and put it in a safe place to access when needed.