Deep Freeze is a tough nut to crack...I was once at a sysm admin conference (geek out) and the vendor had it running on a new system. *IF* you could crack it, you won the computer. After 3 days only three people had been able to circumvent the protection.
Are you the sys admin and have just lost the password?
No, I’m not the system administrator. I’m sure the head of our technology department has the code, but I don’t.