Please connect an Ethernet cable from your existing modem/router/network in to the port labelled "Internet/WAN" on the back of the TP-Link
Connect an Ethernet cable between port 1 on the back of the TP-Link and your computer
Turn on the router and wait for a few minutes
Open a web browser and type http://192.168.0.1 in to the address bar
Click on "Advanced" on the top menu:
Click on "System Tools > Firmware Upgrade" on the left menu:
Click on "Browse" and select the firmware file that you downloaded from the portal: