I use the Xming as an Xserver
In Windows, look for the shortcut to start Xming.
Right click to go to properties.
add -ac to your XMing shortcut:
"C:\Program Files\Xming\Xming.exe" :0 -clipboard -multiwindow -ac
The -ac parameter allows everyone to connect, like ‘xhost +’
Open putty -> connection -> SSH -> check Enable X11 forwarding -> put the actual hostname:0.0
go back to session and login.
You can check in /etc/ssh/ssh_config if X11 forwarding is enabled