If you’re faced with this You need an extension to use this file error, you can try the recommended solutions below in no particular order to effectively resolve the issue.

Computer programs such as Microsoft Word are powerful tools for business owners to create and edit documents. Word documents have a .docx file extension representing the word processing program ...

FileTypesMan allows you to view, add, remove edit file extensions and types on Windows 11/10. You can always manually set or change File Associations & Extensions.