Installing Dynamics NAV 2009 on windows 7
In 2009 it’s not possible to-do a demo installation out of the box. Before starting the NAV installation you need to install SQL server since the version shipped with NAV 2009 doesn’t work on windows 7. When SQL server is installed you can run the NAV installer normally. This problem should be fixed in NAV 2009 SP1.
SQL server express SP3 32 bit http://go.microsoft.com/fwlink/?linkid=65212
SQL server express SP3 64 bit http://go.microsoft.com/fwlink/?linkid=83387