This is an article I have copied from Nuance website since I always encountered this in our clients which are using MS Vista. So for me to remember and easy to find, I'm putting this on this blog.
Problem:
When launching or installing a Nuance Desktop product on a Windows Vista Operating System, the following error may appear:
Error while unpacking program, Code 2. Please report to author
Note: This error may occur when using the following Nuance software:
Dragon NaturallySpeaking
PDF Converter Professional
PDF Converter
PDF Create
OmniPage
PaperPort
Cause:
Microsoft released a new security update for Windows Vista on July 11, 2011 (KB2533623) that has caused problems with certain software. Problems that may occur include not being able to launch or install certain third party applications on Microsoft Windows Vista.
Solution:
We are aware of this issue and are currently working with Microsoft to resolve the problem. Until this issue is resolved, the only way to continue using the Nuance application is to remove the specific Microsoft update.
To remove this KB2533623 Windows Update, follow the steps below:
Click "Start > Control Panel > Programs and Features".
Click the "View installed updates" link on the left side of the window.
Locate the "Update for Windows Vista for x64-based Systems (KB2533623)" update.
Select the KB2533623 update and then click the "Uninstall" button.
Once the update has been removed, restart the computer.
After the computer restarts, confirm that the Nuance Desktop application can now be launched or installed.
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