Is your computer updating itself right now? Do you even know how to tell if it is? Can you make it not? (Note if you’re on Windows 10 the answers to those questions are: probably, there is no way, and no.) That’s how an AI gets uncontrolled, at this point most of our technology basically takes suggestions from us and mostly seems to follow them.
As for how it can kill us all, all depends on what it winds up in charge of. Just look at any of the discussions of EMP, and remember all those systems they talk about failing are already today controlled by some level of AI that we only make suggestions to, and they could even more easily be “turned off” because the AIs decide we’re irritating than by an EMP.
huh? windows update on Win 10 allows you to allow or deny updates and shows you the updates installed.