As you can tell from your experiment by sucessfully running the install on a virtually idendical machine, something very odd is going on.
Give us a call at 978-792-1197. We may need to send you a CD-based installer since the web updates seem not to be working. In addition, the 5.02 installer CD includes a few diagnostic tools that can help us determine what the incompatibility is.
Sincerely,
-Ed Lecuyer
Manager, Quality Assurance and Technical Support
