The referenced assembly is not installed on your system

Symptoms

During installation of the VSTO you receive this error message

The referenced assembly is not installed on your system (Exception from HRESULT:

Cause

Possibly a Corrupt App store in your personal profile

Answer

Rename the 2.0 folder at this location and try again

%userprofile%\Local Settings\Apps\2.0″

e.g.: C:\Users\username\Local\AppData\Apps\2.0

 

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