This is a result of the activation process not having Administrator privileges on Windows Vista and Windows 7 when trying to authenticate and save your key into the registry.

In order to bypass this error please do the following:

1. Right Click on the icon which starts the program.
2. Left Click on Properties
3. Left Click on the Compatibility Tab
4. Check the box for "Run this Program as administrator"

After this process is completed the program should authenticate your serial key properly and start the program.