Set the View by to Small icons and then choose Default Programs. In Windows 7: click the Start menu and then choose Control Panel. The way to choose a default program for a specific type of files, is from Control Panel > Default Programs. Choose a Default Program for specific file types (extensions). Extra: How to restore the default 'Open With' dialog for unknown extension(s). Associate a specific extension to open with a default program. Choose the Default Program for specific extension(s). How To Change Default Programs & File Associations in Windows 10, 8 & 7. Many times there is the need to change the already associated program or app for a specific type of file(s), so I write this tutorial which contains detailed instructions on how you can specify a different program or application to handle a specific file type on a Windows 10, Windows 8 & 8.1 and Windows 7 OS.
If Windows doesn't recognize the file's extension, then the user is prompted with an ' Open with' dialog on ' How do you want to open this file?'.
Whenever you try to open a file in Windows, the system checks the type of the file by reading its extension (known as ' Filename extension') and then launches the appropriate program associated with this type of file in order to open/view the file.
