The course will display an error message about not having the correct version of Adobe Acrobat Reader installed if it detects an older version of that program still on your machine.  Sometimes the older version can he hidden in your Windows Registry keys if newer versions were installed over the older versions.  We recommend doing a complete uninstall of all versions of Adobe Acrobat Reader and reinstalling to see if that resolves the problem. Or, check with your IT specialist about removing older keys that may be held in the registry.