For example, the file extension.txt has an extension of .txt. This extension allows the operating system to know what type of file it is and what program to run when you double-click on it.

Malware and viruses can hide almost anywhere; one of the most common places is the very files you use every day, hidden among those familiar file extensions.

We show you how to open files with no extension in Windows 11/10. You can try these tricks or use one of these free software or online tools.

Mac/Linux users: You can use the file filename terminal command to quickly identify file information. Occasionally you will come across files that have an incorrect or missing file extension. As ...

Table listing every Windows file type that has or can be used maliciously Download this Microsoft Word document table listing over a 100 file types/extensions that can be used maliciously ...

You can create a file without a File Type Extension in Windows 11/10 by carefully following the steps laid down in this post.

Microsoft has shared more information on what types of malicious embedded files OneNote will soon block to defend users against ongoing phishing attacks pushing malware.

Once added to the list of blocked file extensions, users won't be able to download any of these types of files from their inboxes -- unless the Outlook/Exchange administrator has whitelisted a ...