Open your preferred web browser and type http://tplinkmodem.net or 192.168.0.1 into the address bar. Log in using your administrator password. Navigate to > System Tools > Firmware Upgrade .
Version 1.4.0 Build 20230810 (hypothetical latest) reportedly fixes the "Wi-Fi dropout after 7 days" bug that plagued v4 units. tplink archer c5 v4 latest firmware download exclusive