

Make sure you do not forget it Because there's no way of getting it back.

You need to set up a master password can activate and deactivate That Deep Freeze. And unfortunately, enabling or disabling Deep Freeze Will always require a restart. Be careful though, if you forget the program on (on the frozen mode) and then the make some Important changes (eg, write and save an Important document, install a licensed software), Will you lose everything at the next startup.
