29/10/15 - if you are using windows 10, then starting the X system can be 
done by writing xinit in the first  window and then writing startxwin in the
one that cameup to get  an xwindow. See 
http://unix.stackexchange.com/questions/227889/cygwin-on-windows-cant-open-display



Hi Joan,

Here are the instruction how to install and activate aviz in windows:
1. Download from  http://www.cygwin.com 
the setup file "setup.exe".
2. Activate it and start installing it, when he asks which packages to install
its very imporatant to add the entire X library, you can also add other program
and libraries.
3. After installation start the icon cygwin located at your desktop, it will
start a normal terminal NOT GRAPHIC one.
4. (for latest cygwin)  startxwin.bat is replaced with the command
xterm -display :0 &  
in the first terminal see http;//x.cygwin.com/docs/man1/startxwin.1.html
for more details. Course students can ask me for help if they are stuck here.
(for older cygwin which is what you must use for older versions of windows - 
in the terminal enter the following command "startxwin.bat", this will start
the an Xterminal.)
5. In the Xterminal write "ssh -Y -l user computer" to access some other linux
computer with graphic interface options.
6. In your desired computer you should be able to run any graphic programs:
matlab, firefox, pgplot, aviz and so on.

Hope It helps and I didn't forget anything.

Pavel.

This works great - if you do it - using one of the .edu addresses is good - and still have problems you probably did not click on default to change it to install - so try the following (from the cygwin site)

``Note that, when installing packages for the first time, setup.exe does not install every package. Only the minimal base packages from the cygwin distribution are installed by default. Clicking on categories and packages in the setup.exe package installation screen will provide you with the ability to control what is installed or updated.'' .....................................Joan