Thanks, but I have plenty of MOBO memory, etc. The fact that it runs perfectly at the default settings shows that nothing is wrong with it. But the developers did not envision multiple work units, and did not test it for that with all the various hardware/software combinations possible. If you want to run more, that is fine.

But the point about the CPU was that the CPU portion of the work units should not be active at the same time (not overlap).