It will scan for other operating systems and let you select the OS’s you want to add to BCD.To rebuild the BCD or Boot Configuration Data file use the command – bootrec /rebuildbcd.Launch Command Prompt available under Advanced Options.Boot your computer into Advanced Recovery Mode.In the case of boot problems, you may be required to rebuild BCD.
It is required by Windows Boot Manager and replaces the boot.ini that was used by NTLDR earlier. Rebuild BCD in Windows 11/10īCD or Boot Configuration Data is a firmware-independent database file which has boot-time configuration data.
On EFI-based operating system, you’ll find the entry in the EFI firmware boot manager, which is available at – \EFI\Microsoft\Boot\Bootmgfw.efi. In earlier versions of Windows, the boot information was stored in the Boot.
Usually, when BCD gets corrupted, it results in unbootable situations on Windows 11/10. If the configuration file gets corrupted, you will have to rebuild BCD or Boot Configuration Data file. BCD or otherwise known as Boot Configuration Data contains boot configuration parameters on how to start your Windows.
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