If you’d prefer to inspect the extension for one file, rather than show all file extensions by default, you can right-click on the file then choose “Get Info.” The true file extension will ...

I actually never knew you could select "All Files" and type in any extension you want—I always set Explorer to show file extensions and replace it from there—so even that is a cool tip, if you ...

The list, which previously included 104 file extensions, will be expanded "soon" with 38 new entries. These new entries are file types that are regularly used to deliver malware to Outlook inboxes.