This is a short tutorial on upgrading the firmware on your Cisco-Linksys router. Instructions will work for the following models:
Download the drivers for your router.
Select your model, click on the downloads tab, and click on “Download” under the newest firmware date.
Now you need to browse to your router in your address bar. By default the IP of your router is 192.168.1.1.
The default admin username is “admin” and the default admin password is “admin”.
Now click on “Administration” and then “Firmware Upgrade.” You are going to hit browse, locate your downloaded firmware file, and click “start to upgrade.” Your router will reboot and viola, you have the latest firmware.