when installing on Vista, you might get an error: Internal Error 2738 and then the install ends.
One of Vista's libraries didn't get registered
To fix it please run the below from the command line (make sure you run it as an administrator), click on Start and then Run:
Once this library is registered you should not get an error when trying install again, it might require to reboot your PC.
That error on Vista was reported before and it is exposed during install for different software ( independent from the software vendor).