On the right side, select the Open checkboxes for the file types that you want to open in the Protected View. Now, select the Open selected file types in Protected View radio button at the bottom.

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

Microsoft is trumpeting support for its Office Open XML document file format as an international standard from more than 300 companies and organizations on a new "community" Web site set up by the ...

The Microsoft Office Open XML File Format Converter for Mac 0.1b can convert .docx and .docm documents (the latter are Word macro-enabled documents) into RTF format, which can be opened in Word 2004 ...

Microsoft has released Open XML File Format Converter for Mac 1.0, a file translator that allows users to open, edit, and convert Open XML files created in Office 2008 for Mac or Office 2007 for ...

As mentioned in the above paragraph, Microsoft also released its 1.0 version of the Open XML File Format Converter. If you're an Office 2004 user but are constantly getting files from your Office ...

Citing statements of support from more than 300 companies and organizations, Microsoft claimed on Tuesday that interest in its Office Open XML file format continues to grow. Comments backing the ...