install/activate Win 8.1 with Win 8.0 pro pack key?

We have an OEM PC with Windows 8.0 install.  Due to application compatibility issue, we must re-install with Windows 8.1 32 bits.   Asked Microsoft and they said only way is to restore PC to factory 8.0, then use the Pro pack key to upgrade it to Windows 8.0 Pro, and run Windows update to 8.1 Pro.  Obviously a very tedious process.   Lately I came across below article, I wonder if I can use the same trick - ie:  re-activate Window 8.1 using the generic key, then apply the 8.0 Pro Pack key.  thanks

http://superuser.com/questions/650019/how-to-use-windows-8-1-rtm-with-8-0-key

May 6th, 2015 4:16pm

In order to keep everything authentic or legal it will be wise to talk to Microsoft Support Customer care over phone. They will assist you in right direction.
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May 7th, 2015 9:13pm

Hi

You cannot use Windows 8 activation key to activate Windows 8.1, the link you gave applied to Windows RTM and actually someone did that at that time. As you mentioned that the only way is to restore PC to factory 8.0, then use the Pro pack key to upgrade it to Windows 8.0 Pro, then run Windows update to 8.1 Pro.

Thanks for your understanding.

Regards,

D. Wu

May 10th, 2015 9:34pm

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