Hi,
if you are running an ESS then if it runs out of data it produces an error window. You would know if this were the case.
Even a run out of data fault should not crash Mach, the machine will stop certainly but Mach itself should not crash.
I would guess therefore that it's Windows which is crashing.
I run a dual core Atom single board PC to run my machine, and it has no CPU fan. A couple of times over summer I've had the PC stop,
presumably an overheat situation.
Logging is on the Diagnostics tab.
Craig