A single license for Deep Freeze Standard costs approximately $45–$60 USD (one-time, though maintenance is extra). You get:

Faronics still sells licenses for older versions upon request. Contact their sales team directly. A standard license for 8.56 (if available) will cost roughly the same as the current version. You will receive a unique, working license key tied to your name.

If you want Deep Freeze to work—truly work, with stability and security—follow these legitimate paths.