Hidden Extensions | How do I show hidden file extensions on my computer?

charlesd45's picture

Updated: 5/15/2020

Windows hides file extensions by default, and this sometimes causes problems for people trying to get their POI files and alerts to work. With the extension hidden, they sometimes add an extension and end up with a file that has a “double extension” (e.g., mysound.wav.wav)

To show file extensions in Windows 7 or 8:

1) Click the Windows "Start" button (lower left corner of your computer screen) and then select "Computer"

2) Click the "Tools" menu near the top of the window (You'll need to press Alt to show the menu in newer versions of Windows) and then select "Folder Options"

3) Next, click the "View" tab and then find “Hide extensions for known file types” and remove the check mark.

4) Finally, click "OK" to save the change.

To show file extensions in Windows 10:

1) Open the Control Panel. (Right click on the Windows square in the bottom left of your computer screen. Select Control Panel and click on it.)

2) Inside Control Panel, click on "Appearance and Personalization", then “File Explorer Options". This will open the File Explorer Options window.

3) Inside the File Explorer Options window, click on the "view" tab.

  • Remove check mark for “Hide extensions for known file types”

4) After the check mark is removed, click "OK" to save the change.

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