Have a private document on your desktop OS? Here's how to keep it secure on Linux, MacOS, and Windows.

Learn how to encrypt VHD or VHDX files using Bitlocker. The encrypted VHD or VHDX container file is more flexible than drive because it can be moved between devices and hide when you don't need it.

Stop your search for an easy way to encrypt and decrypt files in Linux -- the built-in gpg tool will do the trick.

Next, select Encrypt a non-system partition/drive and select Next. Select the drive you want to encrypt and follow the instructions on the screen.

How to encrypt Microsoft Office files on Windows 10 Some applications now have options to encrypt the types of files they themselves use.

You can encrypt every file in the folder. You can put the folder into an encrypted .zip archive, or into an encrypted vault. [Have a tech question? Ask PCWorld Contributing Editor Lincoln Spector.