Then, double-click on the Office Open XML converters for Word setting and choose the Enabled option. After that, expand the drop-down list and choose the Open in Protected View option.

Office 2013 will, after years, finally fully support Open Document Format, Adobe's PDF, and, oh yes, Microsoft's own Open XML document standard.

The upcoming version of Office will fully support Strict Open XML and Open Document Format (ODF) 1.2, while Word 2013 will also be able to open and edit PDF files ...

Burton Group, in a report that it said wasn't commissioned or funded by Microsoft, recommends that users adopt Microsoft's Open XML file format instead of the rival ODF one.