I don't think that some people might have purely Windows-related problems when running it as a guest under Ubuntu is a reason to outlaw virtualisation questions.
We can deal with the few off-topic ones on a case by case basis.
I determine a topic-ness of a subject in two separate parts:
It's about Ubuntu or one of its derivatives or anything related to them (which is precisely the quote you mention in your question).
It's about an official Canonical product.
The second part is backed by the following text in the help center about the questions that we can ask about: