Extract (unzip) the file on your computer. Look for a file ending in .

If your router was provided by an ISP, generic firmware may not be compatible. If you see an "Error code: 4503" during an update, your device likely requires firmware provided exclusively by your service provider. 2. How to Update Your Firmware There are two primary ways to update your Archer C5 V4: Method A: Web Management Page (Recommended) How to upgrade the firmware of TP-Link 5G/4G Routers

your computer to the router via an Ethernet cable (do not update over Wi-Fi).

Disconnect or disable your computer's Wi-Fi to ensure the wired connection is active. 2. Access the Router Management Page Open a web browser (such as Chrome, Edge, or Firefox).