Linksys Official Support - Resolving the “Your router was not successfully setup” error message during the initial installation of a Linksys Smart Wi-Fi Router
Linksys Official Support - What to do if the router does not work after a failed firmware upgrade
The Misery of a Linksys router
How to update Linksys router firmware? | Linksys Smart Wifi Firmware Update Error - YouTube
Linksys Official Support - Checking the firmware version of your router using the Linksys cloud account