I have the same problem.
I have the ADC 11, 12 bit version. I can't get the install to complete.
I have Win XP and the very old version did install, but couldn't see the ADC, so that's why I upgraded.
I've read through the forums, and before you ask, I have installed the latest release of the software.
Point to note, I'm also using a second parallel port to interface the ADC.
What's the work around?