Using the upgrade tool from Microsoft, I attempted to upgrade my wife's XPS8700. The upgrade fails to recognize the embedded product key. I have already used the tool to successfully and flawlessly upgrade a Toshiba laptop running Win7 Pro and my own XPS8700 running Win 8.1. The install recognized the product keys with no input from me at all. On my wife's system, the input screen for the product key comes up and, when I enter the product key, fails to recognize it as valid. So what now?
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