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Windows 8 Pro Upgrade but no previous version of Windows installed

I recently bought the Windows 8 Pro upgrade pack and updated my current PC from Windows 7. I have the Windows 7 Family Upgrade Pack which allows installation on three PCs (all of which were installed).

I am looking at building a new PC in the coming months and want to transfer the Windows 8 install on the existing PC as a new, clean install on the new PC.

I'm fairly sure that the edition that I bought allows transfer between PCs. However, I have also heard that attempting to install from the upgrade media on a clean PC fails to activate.

How would I go about transferring the license to the new PC?

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marked as duplicate by ChrisF, Karan, Hennes, MaQleod, Synetech Oct 28 '12 at 23:37

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2 Answers 2

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Apparently, the "double-install" trick works to do this.

Duplicate of this question.

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As far as I know the Windows 8 upgrade can only be used on machines that already have Windows 7 pre installed.

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According to the Microsoft website: To install the Windows 8 Pro upgrade, your PC must be running Windows XP SP3, Windows Vista, Windows 7, Windows 8 Consumer Preview, or Windows 8 Release Preview. –  Andrew Spear Jan 24 '13 at 21:40

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