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Does anybody know if its possible that you can run an unattended install with the autounattend.xml without defining a product key?? So that at the first boot Vista asks for an product key? Maybe helpfull what my final goal is Sometime i need to install a pc with Vista, each pc has different hardware so i was thinking that an unattended install was the best option. I also have thought of using sysprep but understand it not entirely Maybe someone can also tell me when to use an unattended file and when to use sysprep