In the past, email servers accepted all file attachments, allowing viruses to be executed by unwary recipients who clicked on them. It was not uncommon to get messages such as "click this ...

What makes these all the more dangerous is that even ... tool – let’s say convert word files into pdf – there may be an advertisement of a browser extension that says users can convert ...

A way to trick users into opening a virus. Many people have learned that text files (.TXT) and image files (.GIF, .JPG, etc.) are safe to launch because they are data and not executable software.