What are File Extensions? A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long.

A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows ...

To open a file in Windows OS, you simply have to double-click on it. When you double-click on a file, Windows will automatically select the program the file is compatible with and open the file.

How to Open Unrecognized File Extensions. In most cases, the majority of the file extensions you encounter on your computer are already associated with a program or protocol. When a file extension ...

How to change the default program a file opens with in Windows 7 When you open files that have a particular file extension, Windows will look at its configuration to determine what the default ...

5. Click the radio button for Show hidden files, folders, and drives. 6. To view hidden file extensions, under Advanced Settings uncheck the box for Hide extensions for known file types.

You can also change that extension’s default program (the one that launches when you double-click a file). In Windows XP, Vista, and 7, right-click the file and select Open with>Choose default ...

Next, open the Files app and the folder that contains the items you want to convert, then long-press on your target file. Next, select Rename from the pop-up menu, and edit the file extension to ...

From the command line, type "backup.bat" and the batch file will run your specified commands: first, copying all files from that directory, then renaming them to remove the extensions.