pour activer la touche F8 au démarrage

bcdedit  /set {default} bootmenupolicy legacy

pour désactiver la touche F8, il faudra saisir la commande suivante :

bcdedit  /set {default} bootmenupolicy standard

Forcer le prochain démarrage de windows 10 en mode sans échec :

bcdedit /set {default} safeboot network

desactiver le safe boot

bcdedit /deletevalue {default} safeboot network

Ajout Safe boot dans menu et boot manuel en selectif

Hit Win+x and select Command Prompt (Admin),

then type bcdedit /copy {current} /d « Windows 10 Safe Mode » and hit Enter.

From the Start Menu type msconfig, run System Configuration in the results, and navigate to the Boot tab. Highlight the Windows 10 Safe Mode option you just created, tick Safe boot and select Minimal under Boot options and – if necessary – reduce the Timeout value so you won’t be inconvenienced – the minimum is three seconds. Tick Make all boot settings permanent (in fact you can simply return here to delete the Safe Mode entry) and click OK.

history update windows 10

https://support.microsoft.com/en-us/help/4099479

fix windows update
https://support.microsoft.com/en-us/help/10164/fix-windows-update-errors

backup windows
https://www.groovypost.com/howto/ultidmdate-windows-10-backup-and-restore-guide/

Dart et recovery drives
https://www.groovypost.com/howto/create-windows-10-usb-recovery-drive/

Black screen
Windows 10 April 2018 Update problems
-cmd mode sans echec chkdsk c: /r /f et sfc /scannow
-verifier espace disk
-patcher https://support.microsoft.com/en-us/help/4284835/windows-10-update-kb4284835
desactiver antivirus
puis
https://www.techradar.com/how-to/windows-10-april-2018-update-problems-how-to-fix-them

How to Manually Download and Install Windows 10 1803 April 2018 Update
https://www.groovypost.com/howto/download-install-windows-10-1803-april-2018-update-manually/

uninstall update , hide
https://www.windowscentral.com/how-uninstall-and-reinstall-updates-windows-10
wumt (windows update mini tools)
https://www.majorgeeks.com/files/details/windows_update_minitool.html

manual install update
https://www.windowscentral.com/how-download-and-install-windows-10-cumulative-updates-manually
-download kb
-Use the Windows key + I keyboard shortcut to open the Power User menu and select Command Prompt (admin).

• Type the following command and press Enter:wusa C:\PATH-TO-UPDATE\NAME-OF-UPDATE.msu /quiet /norestart

pour activer le num lock

desactiver dans les options de demarrage (power options)
menu de gauche, modifier boutons d’alimentation

en cas de probleme

enable NUM LOCK before a user logs on, follow these steps:

1. Run Registry Editor.
2. Move to:
   HKEY_USERS\.Default\Control Panel\Keyboard
3. Change the value for InitialKeyboardIndicators from 0 to 2.

Additional research identifies that:

0 = Numlock is turned off after logon
2 = Numlock is turned on after logon

And a little more research found a similar article from the Hampel Group How to turn on/off Keyboard NumLock on bootup in Windows that yields even better details.

– Turn all indicators Off (Numlock, CapsLock, ScrollLock)
1 – Turn CapsLock On
2 – Turn Numlock On
3 – Turn CapsLock and Numlock On
4 – Turn ScrollLock On
5 – Turn CapsLock and ScrollLock On
6 – Turn Numlock and ScrollLock On
7 – Turn all indicators On (Numlock, CapsLock, ScrollLock)

https://www.interfacett.com/blogs/numlock-key-keep-resetting