For a long time, these occurrences were simply considered a necessary part of systems support, but in recent years an increasingly varied range of methods have emerged to limit what a user can do to a system.
In recent years, 'ghosting' has provided a way of returning the system to a previous configuration. The only problem was that as well as being potentially time consuming to restore, ghosting requires an image for each type of PC, and if configuration changes are made a new image must be created. An alternative approach is to use tools, such as profiles, that allow the changes to the system configuration to be restricted. The problem then becomes how to preserve the systems purpose as a productivity tool while at the same time restricting users as to what damage they can do to the system.
The solution to the problem may be in the form of a product called Deep Freeze, from San Ramon, Calif.-based Faronics, Inc. Deep Freeze is a software product that literally 'freezes' the configuration of the system. Any changes made to the system while it is in a frozen state are lost when the system reboots. The product is so robust that the hard disk can actually be completely formatted, and it will still come back as a completely functioning system when it is rebooted.
At first glance a system using Deep Freeze looks like any other. The system acts and reacts as you would expect. There is no apparent detriment on performance, or any loss of functionality. In fact, the only way to actually tell that the system is frozen is the existence of an icon in the system tray. The program does use about 10% of the available hard disk space, but in today's market where disk space is cheap this shouldn't be too much of an issue.
The Deep Freeze program loads as part of the standard system boot. During the Deep Freeze initialization phase, indicated by a series of periods, you can enter the Deep Freeze menu and disable it if necessary. This allows configuration changes to be made or programs to be added or removed. Once the changes are made, a reboot makes the changes become part of the frozen setup and the system is once again protected.