EDIT: I don't use either programs because one of them is paid and the other one doesn't work on Windows 10. And I couldn't find some good alternatives to them.
¹ Deep Freeze, by Faronics, is a software application available for the Microsoft Windows, and macOS operating systems which allows system administrators to protect the core operating system and configuration files on a workstation or server by restoring a computer back to the saved configuration, each time the computer is restarted. Also known as Reboot to Restore Software.
² Sandboxie is a sandbox-based isolation program developed by Sophos (which acquired it from Invincea, which acquired it earlier from the original author Ronen Tzur), for 32- and 64-bit Windows NT-based operating systems. It creates a sandbox-like isolated operating environment in which applications can be run or installed without permanently modifying the local or mapped drive. An isolated virtual environment allows controlled testing of untrusted programs and web surfing.