I gather that there is a problem with Mach3 and a recent Win10 update - 1803. Mach3 starts, brings up the splash screen, and then fails. I've been running Win7 as Win10 struggled on my garage machine, but a quick test on my main Win10 system seems to confirm this.

I'm just going to stick with Win7, at least while it is supported, but it sounds like another nail in Mach3's coffin. I gather that there is some kind of fix available but for those of us who have to use an older version of Mach3 for CSMIO compatibility, I doubt that will help.

Old habits die hard, but even I'm getting the feeling that Windows might not be the best platform for CNC use...