Wireless security network key

You got a very open ended question there. Are you talking about the network key on your wireless internet modem? If this is the case then you need to connect the computer by cable directly to the modem and enter the IP address on bottom of modem. User is usually admin and usually no password. It should say on bottom. once your in there then change the user pass. If you forgot it then press the reset button for 20 seconds and no less then it should reset it and just do what you did when you first got it and redo the password. Not much info so I just answered with an assumption of what your asking 😉