Here are some rough pointers to get people going on their windows machines.  
I am not as familiar with putty as I usually use a different client, so you may 
be able to do this with putty, but here is my setup... 

Client for SSH and Secure File Transfer from ssh.com.  This client allows forwarding/tunneling of X11 displays.
http://ftp.ssh.com/pub/ssh/SSHSecureShellClient-3.2.9.exe 

You'll Also need an X-Server for your windows machine.
http://prdownloads.sourceforge.net/xming/Xming-6-9-0-13-setup.exe?download 

Install them both, run xming, then connect to whatever linux/unix machine using the ssh client

You may need to change the settings in the ssh client to allow x11 tunneling  to do so, 
use the menus... edit> settings, choose the tunneling option on the left, 
check off the Tunnel X11 Connections box on the right) 

peace,
Tom Kiehl