Installing Inventor and Inventor LT 2012 in same Computer
Prior to the 2012 releases, Inventor and Inventor LT cannot be installed on the same computer. For example, if you have Autodesk Inventor LT 2011 installed and you want to use Inventor 2011 on the same computer, you must uninstall Inventor LT 2011 first before you install Inventor 2011.
Beginning with Inventor 2012 and Inventor LT 2012, you can install both products on the same computer: You can install Inventor without uninstalling Inventor LT, and vice versa. However, you cannot run both on the same computer at the same time.