I'm expecting that this is a bug and not because of two game processes, but because of a high system utilization (low responsiveness of the OS) during startup of the game. That ClockBlocker assumes the helper process didn't launch correctly and attempts a second time to launch it. -Yet two helpers at once is definitely not supposed to happen, and the helpers themselves are supposed to also check for this. So, my code is doing something screwy for sure and I need to re-inspect those IPC coordination fail-safes. Thanks for the clarification. This gives me a pretty strong idea where the problem would be.