Windows 10 start menu freezed or gone

Version française

Start menu and Cortana search bar may stop working without apparent reason.
You can’t do any search or get access to your applications.
Windows touch or start button have no effect.

First method
– Press Ctrl+Alt+Suppr to reach the lock / change user / task manager screen
– from now and during all the duration of this operation, you must keep the Shift key down without release at any time
– with the mouse, use the shut down button at the lower right corner of the screen, without releasing Shift, and choose restart
– when select option screen appears, select continue ( don’t release Shift)
– get in your user session  (don’t release Shift, except when typing your password, but push again shift before validationg password)
– now you can release Shift

Second method

1.  Rioght click on strat menu, then select command line (admin) or powershell (admin)
windows_10_-_invite_de_commande_admin

2. If not yet in powershell, type powershell then push Enter

3. Enter the following command (better with copy/paste from here) :

Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}

4. Display will look like that for several minutes.

windows_10_-_commande_appxpackage

When finished, PS c:windows …. is displayed

windows_10_-_invite_de_commande

5. Try again start menu, then follow this link