Here's the latest...
I have reinstalled Mach 3 twice. I make sure I reboot after install. The parallel port installation does happen and it shows up in the device list.
Mach 3 runs and displays the correct license name.
drivertest does not run, does not show up in the task manager at all. It looks like it wants to run, but terminates in about 1 second.
I am running clean install of Windows 7 on a qualified machine. The version of Mach 3 is what's available on Artsoft's web page right now. R3.043.066
The machine has Norton on it, but it is not running. I uninstalled all the other clean up, speed up, and back up programs that keep popping up on the screen.
Not sure where to go from here.