She went on to share with the class that from time to time, she would inadvertently hit that key, making the screen go full. Of course, she had no idea what key she had pushed. Honestly, I thought she was going to cry.No one in the assisted living center knew how to bring the menus and task bar back and she was frozen in place, unable to do anything.In desperation, she would reinstall Windows from scratch. Not knowing anything about data backups, she would lose everything she had accumulated.Just because she did not know that the F11 key was the culprit and the cure.