/ Problem opening files with .EXE File Extension

Problem opening files with .EXE File Extension

When I go into my notepad, all I get is a bunch of mumbo jumbo that I can’t even understand. Also I have tried going into my Control Panel hitting on Security and Notepad launches with all these numbers and letters. The only thing I can understand is at the top of the Notepad page it reads, “This program cannot be run in DOS.” I don’t understand what has happened but it is very frustrating. I seem to have lost my ovoo, too.