When somebody sends you a document as an attachment, don't just open it. Use the free tool Dangerzone to scrub it clean of any malevolent code. Here's how it works. You probably already know it's ...

Take an ordinary, unencrypted .docx file on your computer, duplicate it, and rename the copy's extension from .docx to .zip. If Windows isn't showing the extension at the end of the filename, you'll ...