Wi-Fi security "key". Where do I find it??

The network key in on the router sticker.

  I honestly do not see anything labeled "network key".  I have:

WiFi network Name, Wi Fi Password, Device Access Code.  The Access code is a bunch of symbols and numbers. Is that it???

   I'm sorry I am such a loser!  I promise I do have other redeeming qualities...  😉

The WiFi Password is what you want to use.

With that said if someone has changed the password then you can...

• Login to the router and look at the wireless security properties. Some routers display that in plain text. Check the manufacturers support site for login user ID and password.
• If you have a Windows 10 computer on your wireless network you can open the Network and Sharing Center on the wireless computer then select Change adapter settings and look at the properties of your home wireless network, ie. click on your home network and select Status then Wireless Properties. Click on the Security tab and check the Show characters checkbox. See the screen shot from my Windows 10 laptop. Its similar for Windows 8.1, 8 or 7.
• If all that fails you could reset the router back to factory defaults and start over. Check the manufacturers support site for help doing that. If you do this you need to change the WiFi password on all your wireless devices so this is a choice of last resort. Make sure you document everything you do and save it in a safe place for future use.

having the same problem

Where can I find the Network Security Key?

The information on the router is not the network security key. It keeps saying incorrect. I don't understand why it doesn't.

Be aware that sometimes look-alike or adjacent characters cause issues with the passphrase, e.g.:

\ / can get interpreted as V,

| might be seen as 1 or l,

l might be seen at 1,

1 might be seen as l,

0 might be seen as O,

O might be seen as 0,

etc.

If you can connect via Ethernet cable, you can see view the password on the Gateway's web interface, or you could change it (using the System Access password also printed on the side of the Gateway).

Most people choose a different password to access their home Wi-Fi other than the one that comes printed on their router or their gateway.  One that's a little easier to remember. 

They are always case sensitive. 

And they should never contain both the letter o and the number 0 because they are easily confused