We currently run it from a network drive, it's just on the share and the teachers get a shortcut to run it. It has software restriction policies in place for both the JustClick.exe and the path. The reason that I came to look into this is because it seems to work on some machines and not on others. I have tried messing with the Java version but it isn't have an effect. Two machines, both logged on as administrators, both with the same version of Java and Flash, one freezes at the intro and the other runs fine.
Not sure what to try next.