I'm running win7 prof under Fedora/VirtualBox-5.0-5.0.10_104061_fedora22-1.x86_64 with a valid product key.
If I try to upgrade to win10, it's rejected: cpu not supported (or similar), and not supported video card (the last seems to be a minor issue).
But my CPU is: Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz. The NX bit is on.
Installing win10 by the media creation tool in VirtualBox runs flawlessly (only the product key is invalid).
So my question: Anybody made similar experiences and could solve the issue?