Installation process depends of software version.
You can find here installation process for Microsoft Dynamics NAV 2009.
You can find here installation process for Microsoft Dynamics NAV 2013, for web-client and portal framework.
You can find here how to deploy Microsoft Dynamics NAV on Windows Azure by using the example scripts.

If you want to download demo versions Microsoft Dynamics NAV, you can do this by versions:
...

Return to Dynamics NAV Overview