It crashed after logging out and logging backin as root. a red screen with exploding bombs appeared. I could not get out of it, tried ctrl alt backspace,ctrl alt f1,ctrl alt delete... mouse keyboard all locked up.. I hit reset... it rebooted and when it tried my boot disk it stopped at "LIL-" I thought oh oh its gone for sure.. but I had just today made another backup boot disk as johnqpupublic had suggested and it worked!! why? my original boot disk is dead it stops ant LIL- what has happened ?