It´s possible to have a X client running with free tools:
- download xmin for windows (http://sourceforge.net/projects/xming/)
- download putty (http://www.chiark.greenend.org.uk/~sgtatham/putty/)
Tips:
- start xmin "Xming"
- start putty
- goto connection : ssh : x11 , check enable x11 forwarding
- open a connection to a host
- than make "xclock" and it will work.