>>>http://venturebeat.com/2016/04/28/microsoft-limits-the-cortana-search-box-in-windows-10-to-bing-and-edge-only/
>>>
>>>If you use Cortana on W10, you belong to MS even more than before.
>>
>>Craig will now explain why Google is worse and Apple do the same thing thus making this MS move a benefit to you. Stop complaining.
>
>The Cortana service is always running in the background even if you "disable" everything in sight. From what I've seen it's not possible to stop it from running, without resorting to hacks that break other things or that might be undone by future updates.

It's for your own good. Google and Apple do much worse. I'm sure an unbiased MS evangelist can explain it to you.