You can make Excel always open old spreadsheets in Protected View. Enable or disable Protected View using in-built setting, Group Policy, Registry.

Want to open old PowerPoint presentations in Protected View? Enable this setting in PowerPoint Options, Group Policy, and Registry.

With the right tools, you can save time by previewing a variety of files in Windows 10 or Windows 11 without opening their applications.

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.

How to Get Excel to Prompt When Opened for Read or Write. Microsoft designed Excel with an optional feature that prompts users to view a workbook in a read-only mode and save edits under a ...

With Microsoft temporarily rolling back a feature that automatically blocks macros in Microsoft Office files downloaded from the Internet, it is essential to learn how to configure this security ...

After the security updates Excel no longer will open the workbook because these files are not compatible with Protected View and there is no warning or other indication it was not opened.