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Solved after upgrading to Parallels 11
I experienced "Windows 10 will not run on this PC" error due to the issue with Parallels Display Adapter (WDDM)" and have tried the solution...
See also this article: http://kb.parallels.com/en/4790 It didn't help me though... The ugly workaround that did work was upgrading to OS X...
Had to restart Hi Jeremy, Many thanks for the advice. Just want to note that Force Quiting the pro_vm_app was not enough and I had to restart...