Windows 10 Clean Install and Windows 8.1 Product Key

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I'm doing a Windows 10 clean install on a machine that already has Windows 8 on it, and still have my Windows 8.1 disk and product key. Will this work for a product key for Windows 10?

Best Answer

You need to perform an in-place upgrade from Windows 8 to Windows 10. The Windows 8 key will not work on Windows 10 as a new key is recorded in cloud tied to your MS ID and the machine's ID (even if the machine is a VM). Further details can be found here: http://blogs.technet.com/b/canitpro/archive/2015/08/13/step-by-step-how-to-clean-install-windows-10-without-formatting-the-drive.aspx