“You are not allowed to edit this selection because it is protected.” but only since Office 2013?

Question

We\'ve had these few lines of code running happily in our applications for several years (and in several versions of Office, 2003, 2007, 2010 etc). Purpose is to perform a kind

Answer 1

We had some C# automation that worked fine with Word 2007/2010, but stopped with Word 2013 with the same "You are not allowed ..." warning.

Following steps on this site solved the issue.

Basically there are two settings to check:

• File – Options – General. Uncheck “Open E-Mail attachments and other uneditable files in reading view”
• File – Options – Trust Center – Trust Center Settings. Select Protected View, then clear all the checkboxes.