In 192.168.1.1, check that your router settings are as they were before. If applicable, re-start the software firewall on the computer you used to apply the firmware update.15.
Restore the cable from the Internet to the WAN connection. (Note that on many models, the connection next to the Uplink cant be used if the Uplink is being used.)16.
A: This describes step-by-step how to do a firmware update on a wired Linksys router.
I recommend printing this off and using it as a checklist.
This includes some extra steps not in the Linksys instructions that will save you time, grief, and possibly your router. There will be some variations for other versions of wired router.