Here is how I removed Cortana from running, and in the background, too.. I downloaded a43.exe(A43 is a file manager) just Google it.. It's found on many websites.. 1st. run a43.exe.. 2nd using task manager, find the address of Cortana by right clicking on properties.. 3rd. go to that address with a43.. 4th. using task manager, turn off windows explorer.. The desktop will disappear.. Don't worry.. 5th. using a43, rename and add ".bak" to Cortana's file name. That gives you the ability to undo the change by renaming the file and deleteing ".bak"... On a restart, Cortana is disabled and so is the search.. Check with Task manager...
