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

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

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.

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

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.

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.

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

Knowing how to password protect a folder on your Mac can help keep your files safe and secure. To create a protected folder on your Mac, you can turn your folder into a disc image, which is easier ...

Write-protected CDs are designed to have files copied to them only once. Blank write-protected CDs are identified as CD-R discs. Using the default options in Windows, once you copy files to a CD-R ...