Because in this case, Nadella became CEO and with that, you could feel a clear change in strategy at Microsoft, more towards cloud services and such, which fits

Because in this case, Nadella became CEO and with that, you could feel a clear change in strategy at Microsoft, more towards cloud services and such, which fits right in with the direction that Windows 10 is headed. From what I can find online, Myerson was put into his position in July 2013, Nadella into his in February 2014, so it's entirely possible that it was actually Myerson doing these things on his own and it just happened to collide with Nadella's promotion, but I would also assume that a Steve Ballmer would have told Myerson off by now, at the very least for the malware-like upgrade strategy, whereas it seems like Nadella is entirely ok with it, heck from how much the man has said to it, you could assume he doesn't even know that it's happening.