Files that have the .txt file extension open with the OS program CMD when double clicking. If the .txt files are right clicked(RC) on and then Edit is selected they open in Notepad. Also when RCed and selecting Open With, another sub menu with Notepad and Wordpad and "Choose defaul program" are shown. Choosing either Notepad or Wordpad works as expected. Selecting the Choose ... option brings up the "Open with" dialog window. Recommended programs are Notepad and Wordpad. Choosing either one works as expected. The radio selection square is greyed out.
The problem is just when double clicking a .txt file, CMD starts to run