Yes, if you analyse revenue (not profit), sales of Windows count 9% of the total. Microsoft makes around the same percentage from LinkedIn and Xbox as they do from Windows sales.
Cloud is by far the the biggest contributor to revenue.
I'm sorry, what? I don't know if this is because of the developer-bubble mindset on HN (or the wealth gap that comes with that), but Windows adoption on the consumer level is around 70% and close to 90% on the business level. This actually falls short from what I see anecdotically (I don't live in any North-American / European country), which is close to 95% of Windows adoption, in general.