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Hi Daniel9,
could you send 'Technical Data' to Parallels and share its ID here (in VM menu bar: Help > Send Technical Data).
Thank you.

We would like to know if you are trying to create a stand-alone virtual machine or a BootCamp based virtual machine. If it is a BootCamp based refer this article.Hello,
For my post above, I forgot to say that I'm running macOS Sierra 10.12.5.
Thanks,
Adam