How to change the default admin username and password of Tplink Archer C9 Router?



Open web browser and type IP address of the Tplink router in the address bar, and press Enter. The default IP address of TP-Link router is 192.168.1.1.
Type the username and password in the login page. The default username and password are both admin in lowercase.
Click Management->Access Control->Password on left page, and type the old password and new password.
Click Save/Apply to save the settings.