Yesterday I bought a new computer with Vista. First thing I did was got rid of all the crap that comes loaded with the new computer.
Then I loaded Mach 3 and set it up exactly as I did on XP. Worked great! No problems. Just had to take the time and clean up the computer of all its crap.
Now I hope that it continues working. All the motors ran smooth and the progam ran well.
Jonny