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installing plesk

1603 is common msi error. Look at event in the EventViewer from MSI Installer. There is usually close to the event from 1603 is an most detailed error description.
You also need to look at autoinstaller log in the place where is written about 1603 or slightly above.
Contact Support Team if you can't find more detailed description of error in logs. They will check and fix it directly on your server.
 
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