In the CMD window, type assoc followed by the file extension whose default program you want to determine and hit Enter.For example, to know the default association for .txt files, run: ...

When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...

For example, Word will associate itself with .docx files, Excel with .xlsx, and VLC Media Player with .mp4 files. This allows a user to double-click on a file and have the proper program launch ...