Bcdedit -

bcdedit /set 5d5f9a7c-... bootlog Yes Disable Driver Signature Enforcement (for test-signed drivers):

bcdedit /set hypervisorlaunchtype off To directly boot the default OS without showing the menu: bcdedit

bcdedit /set 5d5f9a7c-... testsigning on Set timeout (seconds): bcdedit /set 5d5f9a7c-