You really have been away from windows for some time. Windows 10 now only operates with automatic updates by default, you can block individual updates though with the wushowhide tool but the recent version upgrade was ignoring this without taking additional steps to re-hide it.
Incidentally, i brought this issue up well over a year ago but it didn’t gain anywhere near the traction it seems to have now that we’ve been living with this telemetry leaking, adware riddled service. With, presumably, some OS features included.
Though they have been forced to pull back on some of those concerns thanks to the EFF and swiss government