I will explain how to completely remove Cortana from Windows 10 without manually deleting the executable.

You’ll need win6x_registry_tweak utility.

Downloading the utility requires registering for the forum where it’s posted. My fake email received 3 spam emails within five minutes of registering for the forum. Use a fake email to register for the forum and delete it immediately after you log into the forum.

Once you have the utility, place it in a folder, then open an elevate d command prompt in the folder where the utility resides.

Run the utility once to see if you need to install Microsoft .NET packages it requires. If you do they will be downloaded and installed automatically.

Next, this command to remove the Cortana packages:

install_wim_tweak.exe /o /c Microsoft-Windows-Cortana /r

This will completely remove the Cortana packages.