In the previous screens we learned about trusting files with active content. Because some files can contain even greater risks, they open in Protected View, which is indicated by one of several Message Bars, as shown in the picture. Each bar has a warning message and is labeled “Protected View”. When files open in Protected View, you can still read them while reducing risks that can occur. However, functions like editing, saving, and printing are disabled. When Protected View appears with the red Message Bar, the security risk could be greater.
Files open in Protected View because they failed security checks when the file was opened. Files from the Internet, e-mail attachments, and files from other locations considered unsafe can cause a file to open in Protected View. In other circumstances, files created in previous versions of Office can open in Protected View.
If you know the file is from a reliable source, you can exit Protected View. You can click the editing button if it appears on the Message Bar. If the editing button does not appear on the Message Bar, click the File tab and in the Backstage view, click Edit Anyway.