File Block in Microsoft Office prevents outdated file types from opening and can cause your file to open in Protected View via Trust Center.

Microsoft's Protected View feature tries to protect you against potentially malicious files and documents. Here's how to use it.

Microsoft Office 2010 includes a new "Protected View" that, by default, will open all Outlook attachments and documents downloaded from the Internet in "read-only" mode.

Find out how you can disable Protected View & remove Read-only in Microsoft Office programs like Excel, Word, PowerPoint, etc, via the Trust Center.

Likewise, anyone who opens a presentation you send to them via email will open it in protected view if this feature is enabled in their version of PowerPoint.

How to disable Protected View in Microsoft Word Tired of having to manually enable editing whenever you open an attachment? Here's how to skip that step.