Displaying the File Extension in Windows Vista and Windows 7

  1. Click the Start menu. …
  2. Type “folder options” (without the quotes). …
  3. A dialog box with the title “Folder Options” will appear. …
  4. Click to uncheck the box for “Hide extensions for known file types”.
  5. Click the “OK” button at the bottom of the dialog box.
Last modified: April 9, 2020

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