Connect an Ethernet cable between port 1 on the back of the router and your computer
Turn on the router and wait for a few minutes
Open a web browser and type http://192.168.1.1 in to the address bar
The default username is "admin" and the password is "admin" (unless you have changed these prior).
Click on Management and then Update Firmware, click on "Browse" and select the firmware file that you have been provided.
Click on Upload and Click Yes. The upgrade process will now begin and take up to 5 minutes to complete.