1. Use LAN1 or LAN2 port, change IP address PC to 192.168.1.100 netmask 255.255.255.0
2. Turn off router
3. Hold the reset button of the router (WPS / RST) and do not let go!
4. Turn the router power, wait about 10 seconds (must change the nature of the router blinking LED), and release the reset button.