Open a web browser and enter http://tplinkwifi.net or 192.168.0.1 .

Before starting, ensure you follow these safety precautions to avoid "bricking" (permanently damaging) your router: Изтеглете за Archer C5 V4 | TP-Link

: Always perform updates via an Ethernet cable rather than Wi-Fi to avoid connection drops that could brick the device. How to Update Your Firmware Method 1: Manual Update (Recommended for Stability) Download for Archer C5 V4 - TP-Link

acting sluggish or dropping Wi-Fi signals, a firmware update might be exactly what you need. Why Update Your Firmware? Enhanced Security:

Some users on Reddit complain about frequent 5GHz Wi-Fi disconnections that require a manual reboot. Update Recommendations