Just a couple of questions:
In the working (first) computer, does it have internet access? How about the other two computers?
In those two computers, did you ran into any problems during the installation? If so, please explain further.
Have you tried to uninstall the program, restart the computer, and reinstall the software?
After it asked you to continue executing scripts, what option have you selected? And, what happens when you choose either one of them?