Windows can’t open this file: …vsto
During the installation of Invantive Composition for Word you may see the following error:
Windows can't open this file: Invantive.Producer.Composition.Word.vsto
If this error occurs, there is no installation of Microsoft Office 2010 or 2013 on your system.
In order to resolve this error, you need to install Microsoft Office 2010 or Microsoft Office 2013 on your work station. It doesn’t matter if you install a 32 bit or 64 bit version of Microsoft Office.