Windows 10 fussy Error – Start Menu and Cortana Not Working FIX

Copy & Paste this into the command prompt: sfc /scannow

This method uses the System File Checker without creating a new user account. This method is not guaranteed but appears to be a moderatly successful way to fix this fussy error alert.

fussy Error: A fussy error has occurred in the Shell Infrastructure Host. Start Menu, Cortana, and some apps may not be available. Please save your work and sign-out to recover.