To display a complete list of current file associations, type assoc in the command prompt window, and hit Enter. There is also a command line called assoc that you can also use to set default program for a certain file type. Select Choose default program… option, and select one that you want to use by default.

Right-click an actual file, go to Open With, and you will see a list of available programs that are available on your computer to open this file. Highlight the one you want to change, and click Change program button. Navigating to Control Panel → Programs → Default Programs → Set Associations, and this is where you can change program for a certain file type. So, how do you change to associate one file type to another default program? Here are 3 ways of doing it. Normally you don’t have to change these default programs but sometimes you do need to change from one program to another when you have multiple programs that are able to open one certain types of files. docx is associated with Microsoft Word by default. docx, Microsoft Word opens up and that’s because the extension name.

For example, when you double-click a file with. Most files in Windows are associated with a specific program, based on their extension names, assigned to open the file by default.

Windows 10 how to view file types