Uninstall Cortana from Windows 10
Will show you how to use PowerShell to totally delete Microsoft's Cortana voice assistant from Windows 10. Unfortunately, you can't uninstall Cortana via the Control Panel or Windows Settings. We'll also show you how to reinstall it on your computer in case you change your mind later and want to give it another attempt. So, without further ado, let's get this party started.
Steps to Uninstall Cortana
1. To uninstall Cortana on your PC, you first need to open Windows PowerShell with admin privilege. KoRight-click on the Start button and select “Windows PowerShell (Admin)” from the pop-up menu.
Now copy+paste the following command and hit Enter: Get-AppxPackage -allusers Microsoft.549981C3F5F10 | Remove-,AppxPackage