By default, File Explorer in Windows 10 does not show the file extension for most file types. This is a security risk as anyone could send you a malicious file named "Runme.txt.exe" but Windows will hide the .exe portion, so an inexperienced user can inadvertently open the file thinking that it is a text file and malware will infect his or her PC.
Tag: AlwaysShowExt
How to show or hide file extensions in Windows 8.1
By default, Windows 8.1's file manager, the File Explorer application (formerly known as Windows Explorer) does not show the file extension for most file types. This is a security risk as anyone could send you a malicious file named "Runme.txt.exe" but Windows will hide the .exe portion, so an inexperienced user can inadvertently open the file thinking that it is a text file and malware will infect his or her PC.
In this article we will look how to change this behavior so file extensions are always shown, and, as a bonus, we will also look at how we can force File Explorer to always show or always hide file extensions for a specific file type.
