Took a week to make the visual studio android emulator work.
First, it was hard to get complete set of updates fort windows 10 preview. I ended up installing cleanly, from disk. Only then, would the arming of optional windows hyper v components actually work (from control panel, install…)
Then, I had to run visual studio as “administrator” from start menu. Otherwise, “could not remove” errors would stop launch.
may or may not be relevant that I created a virtual switch , too.