If you just want to test a sketchy file safely, Windows 10/11 Pro has this built-in. It’s a totally isolated environment that vanishes when you close it.
: Allows you to create virtual partitions where data can be saved permanently even when the rest of the system is frozen.
So, what does "Permanent Free" usually mean in this context?
This is the closest free equivalent to Deep Freeze. It has a simple "Start" button to enter a frozen state and wipes everything on reboot.
Deep Freeze Enterprise Latest Version and Release Notes - Faronics