If the web interface rejects the file, verify:
How to Update Software/Firmware in TP-Link TD-W854W: Updated Guide update+software+in+tplink+td854w+updated
Let's execute the update. Ensure your PC has a static IP address ( 192.168.1.10 , Subnet mask 255.255.255.0 ) to avoid DHCP timeouts during reboot. If the web interface rejects the file, verify: