Ok, some more detail:
The application in question is a shipping container tracking software
I logged into the computer - still has the same name as the parent image, and would freeze logging in. I told another clone to shut down, and that froze shutting down.
I forced all the computers to turn off, turned them on, logged in, and they now have their own computer names and the composer has taken over and started reconfiguring the computers.
Problem now is, why is it locking up between cloning and renaming the guest ...