I am getting an error that the Start Menu and Cortana are not working
First try restarting the computer to see if that resolves the issue. If the error persists, Microsoft recommends additional steps at this page:
https://support.microsoft.com/en-us/help/12385/windows-10-troubleshoot-problems-opening-start-menu-cortana
including options like the Start Menu Troubleshooter Utility.
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