How-to delete Unknown File Format in Microsoft Photo Editor?

To delete an unknown file format in Microsoft Photo Editor, first, open the program and navigate to the location of the file you want to remove. If the file is visible in the workspace, select it and press the "Delete" key on your keyboard. If the file format is not supported and you cannot open it, simply locate the file in your file explorer, right-click on it, and choose "Delete" to remove it from your system.