Until we can get a more comprehensive idea of it’s privacy implications…
Or if you just plain and simply have no use for the stupid APPLE nock-off.
Warning: This will also kill the “Search” functionality on the taskbar too, which I know some of you have no need for whatsoever.
Prior to performing the following I recommend that you curtail Cortana as much as possible from within it’s own settings first,
and then the last bit here should finish it off completely. Take note that a future WU may repair this and it’s
also highly possible that a typical OS repair will do the same.
First open up task manager and look for it’s backgrounds process. Take note that
it comes right back after “ending” it, so…
Navigate to this folder: C:WindowsSystemApps in Windows Explorer & right click on
the folder “Microsoft.Windows.Cortana_cw5n1h2txyewy”, attempts to rename it will fail, but after
failing to do so, go back to Task Manager and end it again. Then quickly switch back
to renaming it, it should take this time and Cortana will no longer show up in Task Manager.
The above worked for me and was found here.