Hi,
I know it is the norm to update Windows but why? It would help if you are getting updated security patches to avoid the latest scam but your CNC PC shouldn't be
on the internet and not exposed to the threats and not therefore require all the latest Windows updates.
I am intrigued that you should be asking on a Mach forum 'what's wrong with Mach when it fails after an update' instead of on a Windows forum asking 'what's wrong with
Windows, one of my applications fails now that the update is in place'.
I can only presume that the PC you use for Mach is also used for all or a lot of your other classroom activities? If that's the case then it may well be a regular thing that
Windows updates are going to interfere with Mach.
My suggestion would be in the first instance to check the firewall rules to ensure that nothing has changed. The second idea may be to see if you can exclude the Gcode
files requested by Mach from the anti-virus scan.
Craig