If you’ve ever had your PC messed up by a child, KidSafe is for you. It was designed to lock your computer while a child is using it, to stop them changing important settings. KidSafe will launch a full-screen window that hides the entire desktop, TaskBar, etc. Because the window is blank, clicking it won’t have any effect. Small children, who generally enjoy clicking the mouse, can click all they like without damaging anything.