I wouldn't bother. I'm pre-update and have turned it off when I installed Windows 10. Yet App history shows a cpu usage of 0:07:25 and network transfer of 1.5M

I wouldn't bother. I'm pre-update and have turned it off when I installed Windows 10. Yet App history shows a cpu usage of 0:07:25 and network transfer of 1.5MB for Cortana.