I have Windows 8 RTM installed in my computer which of 64-bit version. I want to convert this RTM version in retail version to get the Windows 8 Pro in my computer. I have purchased Windows 8 RTM from legal source and even paid for it. I even have the product key along with it. But whenever I try to get the retail version of Windows 8, the process fails. Can someone tell me why this is happening?
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