Many CFANS lab computers run a program called Deep Freeze in the background; this software erases all changes made to the computer (this includes saved files) each time the computer is restarted. This process ensures that each user will have the same computing experience, and it protects the computer in the event that someone were to accidentally delete an essential program file or alter important programs. Of course, this means that if you save your work on the desktop or anywhere on the "C" drive, it will be erased as soon as the computer reboots.