Oh dear, oh dear, what have my parents done this time.... My folks have somehow deleted System Preferences so that it doesnt open through the apple icon at the top left of the screen, and it is nowhere to be seen within Applications or Utilities. Ive tried installing the bundled software from the Installation disks, but no joy. Will I have to Archive & Install the whole OS? Any help will be gratefully received - all I wanted to do was change the freaking display sleep settings! Meh and double-meh...!