Reboot Restore Rx - Reboot Restore Rx (freeware) prevents any and all changes made on your drive(s) making those PC's bulletproof and unbreakable.
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
Deep Freeze - DESCRIBING DEEPFREEZE SOFTWARE Deepfreeze, by Faronics, is an application that solves a unique problem that many companies have these days; it prevents an end user from making permanent changes to important system/administrative files.
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
Rextore - REXTORE is a Reboot-to-Restore software.
AOMEI Backupper - AOMEI Backupper is a software created to help a person backup, restore, clone, and sync their entire Windows system.