The GX boards have a bug that allows a user to change the wallpaper from the built-in browser’s “right click” menu options. Since the option to change wallpaper is configured behind the admin security area, no other application should be able to override this. You can understand how issues can arise in an education system where students have access to the board. Display lock codes don’t work in education because the teachers are forced to unlock the code in front of the students, so codes would last less than a day.