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These keys come from the Windows OEM Preinstallation Kit (OPK) and the Windows Assesment Depolyment Kit from the Microsoft OEM partner pages.
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Well recently I have found a set of standard keys for this that will not activate but will allow you to install your system for testing and configuration.
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So if you are familiar with making an image to deploy through WDS (Window Deployment Services) then you will know how sometimes you will need a product key to install the image on the first computer before syspreping and capturing the windows image.
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