Please note: this guide is for the Archer WR840N hardware version 1,2,3,4,5 router. The later hardware versions of this router have a different colour scheme but the below guide follows the same steps
*We recommend that you do the following with a cable plugged in from one of the LAN ports of the
router to your computer to prevent you from being immideately disconnected after changing the wireless settings.
The following status page will appear once you have logged in
Navigate to Wireless > Wireless Settings on the left-hand menu
Please then select the Channel drop-down list (which should be set to Auto) and select a channel that is unoccupied in your area. - If/when possible set your wireless channel to 2 channels away form the nearest occupied wireless channel.
Once done, please click on the Save button and the new wireless channel settings will then be applied.