I just uninstalled eveything to do with mach3, and then deleted "C:\Mach3".

I then installed Mach3 3.043.022, No LazyCam, no PrinterPort driver, no ESS Plug-in, Installed 2010 ScreenSet, Copied Mach3 xml and license file to "C:\Mach3".

I then ran Mach3 with my xml file, and I was still able to make Mach3 crash.

So I thought there might be an error with my xml file, so I loaded Mach3 with the default xml, and I can still get it to crash.

Any more ideas?