1. #1
    HappyAndyK's Avatar
    HappyAndyK is offline Site Administrator
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    Default How to rebuild BCD or Boot Configuration Data file in Windows 10/8/7

    To rebuild the BCD or Boot Configuration Data file in Windows 10/8/7, in an elevated Command Prompt, type the following command and hit Enter:

    bootrec /rebuildbcd
    This will scan for other operating systems and lets you select the OS’s you want to add to BCD.

    BCD or Boot Configuration Data is a firmware-independent database file which has boot-time configuration data. It is required by Windows Boot Manager and replaces the boot.ini that was used by NTLDR earlier. In the case of boot problems, you may be required to rebuild this file.

    If this does not help, you can try this - but do so only if you are an expert, as it could create issues.

    In the elevated command prompt, type the following command and hit Enter:

    bcdboot c:\windows /s c:
    This will give you a new Bootloader. Here "c" is the system drive.

    You can get the explanations on BCDboot Command-Line Options here on Technet.

    You can also use EasyBCD or Dual-Boot Repair to repair your BCD file. It also lets you repair & rebuild MBR.

  2. #2
    EddieB1106 is offline New Member
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    all of a sudden my system stopped booting for no apparent reason. I have access to the system from a cloned drive from 2015. I tried using the bootrec to rebuild but the scanOS reports no windows installations. What is my next resort? I tried all the troubleshooting from the WIN10 DVD and nothing works. If I try the automatic repair, I get an error sscrdbus.sys

  3. #3
    HappyAndyK's Avatar
    HappyAndyK is offline Site Administrator
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  4. #4
    EddieB1106 is offline New Member
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    I've tried them all and still cannot get the system to boot, have some inkling there is a different issue. Ever hear of lmbhkoru.sys? I've searched everywhere and it does not appear anywhere.

    Root cause found:
    ---------------------------
    Boot critical file c:\windows\system32\drivers\lmbhkoru.sys is corrupt.

    Repair action: File repair
    Result: Failed. Error code = 0x2
    Time taken = 5531 ms

    Repair action: System files integrity check and repair
    Result: Failed. Error code = 0x490
    Time taken = 537657 ms

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