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How can I upgrade Windows 8 OEM single-language to Windows 8 Pro with a Volume License Key? I use the Add Features to Windows 8 -> Enter the volume licensing product key and it does not accept it. It shows "This Key Won't work"

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up vote 0 down vote accepted

You can't upgrade to a VLK. You need to have it installed from the DVD made from your VLK provider

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Thanks for your info. i appreciate your help – edgar Jul 3 '13 at 4:39

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