If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.

Need to use third-party programs to open files on your PC? Here's how to change file associations in Windows 10 and choose which apps open which file types.

MBOX files are a convenient and flexible file format that can be opened in any text editor -- including Microsoft Notepad, Apple TextEdit or GitHub Atom.

Anyone know of a way on a win98 machine that I can create an icon that will prompt the user to open a file, and then open it in notepad?I thought for sure there was a command line switch that ...

Start a plain text editor, such as Notepad on Windows or Textedit on Apple. These programs can open and view some of the information inside the XFDL file format.