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.

Restic - Easy: Doing backups should be a frictionless process, otherwise you are tempted to skip it.

Reboot Restore Rx - Reboot Restore Rx (freeware) prevents any and all changes made on your drive(s) making those PC's bulletproof and unbreakable.

Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.

Rollback Rx - RollBack Rx is an instant time machine for your PC. A Comprehensive Windows System Restore solution that empowers users and IT administrators to easily restore their PCs to any previous state within seconds!

rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.