Script error when trying to repair, change or uninstall software.

A user with Windows 7 Pro 64 bit laptop has a program called EasiSuite which is no longer supported by the software company. He still needs it as he has not moved all of his customers to the new software yet. Easisuite has run successfully on his laptop for about 1 year with no issues but recently it stopped opening up for him and was giving him an error message which I did not see. He tried running the repair through "Programs and Features" but the repair almost completed but then stopped with an error - "a script required for this install to complete could not be run". At this point, I came in and tried to "uninstall", "change" and "repair' the software using the "setup" program from the cd and I receive the same script error message. I attached a screenshot and a corresponding event in event viewer. I have uninstalled the antivirus. I have successfully been able to uninstall the software with the Microsoft Fix It utility (it was not listed in Programs and Features anymore), but I receive the same "script" error message when I try to reinstall the software from the cd.

Other items worth noting - When I try to run the program, it will stop and say that an .ocx file is probably not registered. I have successfully registered about 5  .ocx files but now it keeps saying that one of the ocx files is not the correct version.

 My question is " How do I troubleshoot the script error message?"
easisuite-installer-error.docx
easisuite-installation-issue.txt