Deep Freeze is a "reboot-to-restore" software developed by that ensures a computer's configuration is restored to a saved state every time it restarts.
If you must use version 8.56, the only safe way is to purchase it legitimately. Faronics can still issue a license for 8.56 upon request, but note that they will not provide technical support for bugs or security vulnerabilities found in such an old version. deep freeze standard 856 license key work