Hi:
Hmm. OK, well first, its not a driver issue or a speed issue, I dont think its an optiisation issue either.
The fact that it shuts down with an application fault is very very strange. Happens to less than .0000001% of
people. In other words, your only the second on Ive seen. This is caused by some internal program trying to
run at the same time, but triggered to load by Mach3..typically. The fact its happenign on all three versions you tried is
very telling in that the three share very little in code.
Are you sure no antivirus program is running (and no virus). This is suspicious of spyware trying to get a hnadel on whats going on.
or some weird interaction. Id try runnign in safe mnode and seeing what happens.. Then, I think Id try installing Mach3 and telling it not to install the driver so it loads as a simulator. See if that also crashes. An application fault is not a normal fault.. Migth take a reload of Windows to clear that one..
Thanks
Art