First I got this page that I assumed should be useful. But it was not. :( Anyway I put that link so it CAN be useful for someone else.
Second point was to use advice that I found here
So I navigated to http://www.microsoft.com/en-us/download/details.aspx?id=18249 And installed Microsoft Office 2010 Primary Interop Assemblies Bootstrapper Package.
And finally I deleted Microsoft.Office.Interop.Word.dll
reference in the project and added another one
Visual Studio installs these copies of PIAs to the following locations:
On the development computer:%ProgramFiles%\Microsoft Visual Studio 12.0\Visual Studio Tools for Office\PIA\Office14
(or%ProgramFiles(x86)%\Microsoft Visual Studio 12.0\Visual Studio Tools for Office\PIA\Office14
on 64-bit operating systems)
%ProgramFiles%\Microsoft Visual Studio 12.0\Visual Studio Tools for Office\PIA\Office15
(or%ProgramFiles(x86)%\Microsoft Visual Studio 12.0\Visual Studio Tools for Office\PIA\Office15
on 64-bit operating systems)
And yeah!!! Error gone! :)