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

How to Open a Password-Protected PDF File To check if your PDF is indeed password-protected, open it with any PDF viewer, and it will prompt you to enter a password.

Here you need to ensure that the Open selected file types in Protected View option is selected. Then, tick all the Open checkboxes of old Word versions. For example, you can check these checkboxes ...

When you're unable to move or copy a file because it's write-protected, your problem may stem from a number of causes. If the file is in use by Windows or an application, the file remains locked ...

How to Open a TrueCrypt File. The free, open-source TrueCrypt file encryption program allows you to create encrypted container files for protecting sensitive data.

Sending important documents? Learn how to password protect PDFs for extra security using easy steps with Adobe Acrobat and free online tools.

With the Excel file open select File in the top-left corner of the screen, followed by Info. Select Protect Workbook, then choose Encrypt with Password.

Turn off password-protected sharing in Windows 11 to simplify your home network file access. Our guide covers the steps involved.

You can protect the contents of a ZIP file, but unless you know the trick, you might as well not bother.

Learn how to hide or encrypt specific files in Windows in order to better protect them.