How to set the default program for opening files without an extension in Windows?

With the command line: Restart the computer for the changes to take effect. To give credit, I learned this from the vim wikia here and here Extra info: Instead of , the following macros may be useful: - drive windows is installed on, i.e. - e.g. - e.g. You will need to properly escape them though: To set the icon to be the same as .txt files (I didn't do this, since it automatically made the files' icons display as Notepad++ files): To undo, you can read the or information, e.g.: