Originally Posted by
dsignori Thanks. So what is the dll file name, and where is it exactly?
This was a bit more complicated than I anticipated. I'm posting this in case others had the same issue with file permissions.
1. Launch Command Prompt (Admin).
2. cd to C:\Windows\SystemApps\Microsoft.Windows.Cortana_<whateveritisonyourmachine>
3. Type and hit Enter: takeown /f Cortana.Core.dll
4. Type and hit Enter: icacls "Cortana.Core.dll" /grant <whateveryourWindowsusernameis>:F
5. Type and hit Enter: rename Cortana.Core.dll Cortana.Core.dly (or whatever extension you prefer to use).
6. Open Task Manager once you have renamed the dll file above.
7. Under Processes tab, look for "Cortana".
8. Right-click and "End Task."
I hope this helps. I just disabled Cortana. I'm not sure if it's solved my cooling fan constantly revving up and down problem yet (ThinkPad Yoga 14 / Lenovo). I did not have this issue until upgrading to Windows 10. Such a pain.