It shouldn't happen anymore, but what kind of braindead update system didn't check for that in the first place?
> One of the ongoing feedback items we’ve heard is how the apps that come preinstalled with Windows will reinstall after each upgrade – particularly noticeable for our Insiders that receive multiple flights per month. We’ve heard your feedback, and starting with Build 14926, when your PC updates it will check for apps that have been uninstalled, and it will preserve that state once the update has completed. This means if you uninstall any of the apps included in Windows 10 such as the Mail app or Maps app, they will not get reinstalled after you update to a newer build going forward.
"Oops, we totally forgot to consider that any users would want to uninstall this bloatware, so we just included it again as part of each update. And definitely no one inside our organization had personally uninstalled Candy Crush, pointed out this problem, and had their concerns ignored because we wanted to maximize the number of installs that our partners are paying us for. User experience is our highest priority, and what're you going to do about it, switch to Linux?"
https://blogs.windows.com/windows-insider/2016/09/14/announc...