After the problem is solved, remember to enter the above window again in safe mode, cancel the "safe boot", then reinstall and enter the system normally.
Reset all UWP applications installed by Windows, and execute the following commands in PowerShell in administrator mode:
get-appx package-all users | Foreach { Add-appx package-disabled development mode-Register " $($ _。 install location)\ appxmanifest . XML " }
After the reset, let's see if we can completely solve the problem that the start menu and Cortana can't be used. If the above methods still can't be solved, you can try the official solution given by Microsoft.
Press Win+R to open the running window, enter services.msc to enter the computer management service interface, find and double-click to open the user manager service, change the startup type to "Automatic", click "Log off immediately" in the pop-up "Critical Error Prompt Box" and log in again.