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Definition: Win Show file extensions


New installations of Windows default to hiding the file extension when file names appear in Explorer windows and Open/Save dialog boxes in applications. However, this important element of the file name can easily be made visible, and it is one of the first things a user should do after installing Windows. See extension.

 Windows 7
 1. Launch Explorer
 2. Select Tools/Folder Options/View
 3. Uncheck Hide extensions for known file types.

 Windows 10
 1. Launch Explorer and select View.
 2. Check File name extensions.