I have a similar problem, but with the PUK. Actually, I just got a new copy of the original from Gamers Gate, and it works perfectly well on my Windows 10 Pro. But the PUK that I have does not work on my Windows 10 Pro. Either I get an error message similar to heirtothestar's (just with different random symbols) or, if I have applied a compatibility option in the properties, Win 10 asks if I want to run the program even though its from an unknown publisher, and I say yes, and nothing happens. I haven't had this problem with Win 7, so I don't know what's up. Anyone getting the PUK running in Windows 10 Pro? Or even Windows 10 Home, for that matter?