Originally Posted by
Saracen
It requires an MS account to operate properly, and SAYS it isn't working without one, but what evidence is there (serious question, by the way) as to what, if anything, it does under a local account?
Does it simply not load? Or loads and monitors, but doesn't record ANY data? Or loads, logs data but doesn't assign it to any form of unique ID? Or loads, logs and assigns to a unique ID linked to that machine ID, which it then tries to associate with a unique User ID via other means, like location, sent/rec'd emails, for instance. And if so, is that unique ID ever subsequently linked to an MS account, or a physically unique person?
For instance, someone (me, for example) runs Win10 with a local account. I send/receive emails, texts, etc and Cortana does it's thing but, because I don't have an MS account, doesn't attempt to personalise based on it. It does, however, assign a unique hardware ID to my machine. Associated with that ID as a primary key are my email address and the phone number in my contacts for, say, you.
You, on the other hand, have my name, email address(es), birthday (so you can send me a card), address (to mail the card), work number, mobile number, etc. So now, MS can link my machine ID to me, personally, through data gleaned from YOUR machine, because they have name, address, DOB, phone and mobile numbers for home and work, etc.
The only thing MS haven't done in all that is create an MS account.
Now suppose a relative of mine is a member of, ummmm .... a higjly secretive clandestine intelligence organisation, and I have their emergency phone number. As soon as, or maybe even before, I open an MS account, MS have access to that because it's in my contacts.
And if you think that's highly speculative, I do have a now-deceased relative that was indeed a member of an official body sufficiently secretive I wouldn't have mentioned it had they not been deceased for a long time. And it's not a US organisation either, which would have put MS's possession of ANY data about that person into context.
But all that aside, we simply do not know what Cortana might be doing behind the scenes, or might, by virtue of auto update, start doing in three months or three years.