Boot Options in Windows 10

Overview of Boot Options in Windows 10 qui différent des versions précédentes

Overview of Boot Options in Windows 10 qui différent des versions précédentes 

Windows includes boot loader components that are designed to load Windows . The previous Windows NT boot loader, ntldr, is replaced by three components:

  • Windows Boot Manager (Bootmgr.exe)

  • Windows operating system loader (Winload.exe)

  • Windows resume loader (Winresume.exe)

When a computer with multiple boot entries includes at least one entry for Windows, the Windows Boot Manager, which resides in the root directory,

starts the system and

interacts with the user.

It displays the boot menu,

loads the selected system-specific boot loader,

and passes the boot parameters to the boot loader.


The boot loaders reside in the root directory of each Windows partition. Once selected, the boot loaders take over the boot process and load the operating system in accordance with the selected boot parameters.


Boot Configuration Data

Windows boot options are stored in the Boot Configuration Data (BCD) store on BIOS-based and EFI-based computers.

BCD provides a common, firmware-independent boot option interface for all computers running Windows 10,

BCD is available at run time and during all phases of setup.

(You can even call BCD during power state transitions and use it to define the boot process for resuming after hibernation.)

You can manage BCD remotely and manage BCD when the system boots from media other than the media on which the BCD store resides. This feature is extremely important for debugging and troubleshooting, especially when a BCD store must be restored while running Startup Repair from a DVD, from USB-based storage media, or even remotely.

The BCD store, with its familiar object-and-element architecture, uses GUIDs and names such as "Default" to precisely identify boot-related applications.

BCD includes its own set of boot options.




To view the current boot entries and their settings, use the bcdedit /enum command. This command displays the active boot entries and their associated globally unique identifiers (GUID). Use the identifiers with the /set command to configure options for a specific boot entry.

Quand on boote d’un Windows non C:

bcdedit /enum all

depuis winre

bootrec  /scanos recherche d’installations Windows sur tous les disques

‘’( ne trouve pas c:Windows mais c:Windows;old/windows  )

our cela, tapez les commandes suivantes à l'invite de commandes de Windows RE :

  • bcdedit /export C:\BCD_Backup
  • c:
  • cd boot
  • attrib bcd -s -h -r
  • ren c:\boot\bcd bcd.old
  • bootrec /RebuildBcd


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