You can try to find Linksys router as key as given under:
A. First of all, please check the bottom side of your linksys router, do you see any see any key mentioned on it.
If yes, please try to use that key.
B. Else, you can try to find linksys router key as given under:
Please, follow these steps on the computer(like your desktop computer) which is connected to the router using an ethernet cable directly. However, if you have a laptop only, please connect an extra cable from router to laptop once.
Open your web browser, like internet explorer or Firefox. Delete everything from the address bar(the box that start with http)and type in 192.168.1.1(if this does not work, please type 192.168.2.1 or 192.168.1.2) and hit"Enter."
Now, it will ask you for user name and password
username=keep this blank(do not type anything into this box)
or(if this does not work)
Use admin as the user name in the pop-up box and admin in the password *****
You will see your SSID. This is the name of the network you will see it under available network connections.
Under Wireless, Go to Basic wireless settings, Wireless security
You will find your key here.
You can find screenshot on this page:
(Copy and paste it into address box)
I will work with you until it is fixed.
Let me know the results please by clicking "Reply to Expert".