bazza_88,
It's the error codes in Windows Vista,
Error 2503: Called RunScript when not marked in progress
Error 2502: Called InstallFinalize when no install in progress.
1. Your need to give full permission when you try to install the software in Windows Vista. The instructions can be seen
here.
Or
2. Please check the date and time, reset the date on your computer to the correct date if it's not.
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