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.