If the WPS button is not working, then you need to connect to the Administration interface of your router and access the WPS menu under Security or General Settings. To find the IP of the router, simply go to Start > Run > cmd > ipconfig /all. Copy and paste the IP address on a browser tab and load it. Input the default username and password and you should have access to the interface. Enable the WPS, reboot the router, then you can connect the devices through WPS.
