Summary: Double-clicking .exe or .lnk (shortcut) files may open Notepad or any other application, displaying junk characters.
Did you accidentally use the Default Programs or Open With dialog to associate .exe file types with some application like Notepad? This causes every program to open in that chosen application. Unfortunately, Windows provides no option to reset the .exe file associations. You need to fix the association settings using a .reg file or script.Read more