Windows 10 client machine. From a command prompt, when attempting to thaw or freeze a machine using the DFC program. (This would be part of a KACE script file). The format of the command is "DFC password /boothawed" or "DFC password /bootfrozen".
In either case, the machine comes back with an error message: "Internal error executing command."
This is a bug within Deep Freeze - their developers are working on the issue.
So - the short answer (right now) is that if you have a Windows 10 machine, you can't make a KACE script that will thaw or freeze a machine. :(