Last night I set up a virgin Windows7 64 bit machine for testing. I downloaded
build 3390 of Mach4 and installed it to run in DEMO mode. The default firewall in
Windows7 did generate a pop-up dialog about network access each time that
I started Mach4. I declined to give Mach4 network access.
Mach4 ran normally including configuration, jogging, G-code execution, and
specifically it did NOT generate any password request for MDI usage.
The only thing that I can think of that would ask for a password would be if
you somehow installed something with a Locked Screen Set. If you would
like further assistance, I would recommend capturing and posting a screen
image when this happens. Also provide information on what build of Mach4
and what OS you are running.
Steve Stallings
www.PMDX.com