How to run applications in x from ssh?

view story

http://askubuntu.com – I have recently switched from windows 7 to ubuntu 12.10. In ubuntu 12.10 I am using putty to connect to a unix machine remotely where several of my files are stored but editing texts files through the command prompt is tedious in my opinion. How can I configure putty to allow me to run xterms and in turn run software such as emacs (which is installed on the unix machine) to edit files on the unix machine from my ubuntu machine? In windows an x server is needed such as xMing, is any additional software necessary? (HowTos)