A file extension is a character set assigned to every file at the end of its name. These set of characters or file extensions are used to determine which program or application can open the file. File extensions of known file types are hidden by default in windows due to system security reasons. However Windows 7 has an option to display known file extensions by making a small adjustment in folder options. This tutorial will show you how to enable the Windows 7 display of file extensions using the folder options.
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