So it's certain that if we turned wi-fi off (turn airplane mode on), the update will stop soon. Once amazon released a new firmware software, our devices like Kindle paperwhite, Kindle Fire HD, will be updated automatically once wi-fi connected well. But Sometimes you may notice windows updates stuck downloading at specific percentages such as 0 %, 20% or 99% etc. By doing this Microsoft ensures every device updated and secure from malicious attacks.

And whenever new updates available it automatically download and install via windows update.There's exactly one option on that page that you can disable, I'm sure you'll find it. And if the aren't loaded you don't have to install them. As I said, disable the automatic loading of android updates in Settings > Software-Updates.