Microsoft's Windows business just had its best quarter since Satya Nadella became CEO, and it's thanks to the demise of Windows 7 (MSFT)

· Microsoft's overall Windows revenue increased 18% in its most recent quarter from the same period the year before. That makes it the best quarter for Windows in terms of growth since Satya Nadella became CEO in January 2014.
· The increase is due in large part to Microsoft ending support for its popular Windows 7 operating...