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Difficulty: MediumMicrosoft Command-Line Tools

A system administrator is troubleshooting a Windows workstation that fails to start up, displaying an error indicating that the Boot Configuration Data (BCD) file is missing or corrupted. The administrator boots the workstation using Windows installation media, opens the Command Prompt within the Windows Recovery Environment (WinRE), and needs to repair the boot configuration. Which TWO of the following bootrec utility commands should the administrator run to repair the Master Boot Record and rebuild the BCD store?

  1. bootrec /fixmbrAnswer
  2. bootrec /rebuildbcdAnswer
  3. C
    bootrec /cleanall
  4. D
    update-grub

Answer

To repair the Master Boot Record and rebuild a corrupted BCD store from the Windows Recovery Environment command prompt, the administrator must execute 'bootrec /fixmbr' and 'bootrec /rebuildbcd'.
Executing 'bootrec /fixmbr' writes a standard Windows-compatible MBR to the system partition to resolve boot code corruption. Executing 'bootrec /rebuildbcd' scans connected storage devices for compatible Windows installations and rebuilds the BCD configuration store.

Step-by-Step Solution

1
Identify the required boot recovery steps within the Windows Recovery Environment.
Determined that resolving BCD corruption and startup failure requires rewriting master boot code and repopulating the boot configuration store.
The bootrec.exe utility in WinRE provides dedicated flags for repair of MBR and BCD structures.
2
Select the command to repair master boot code.
Chosen command: bootrec /fixmbr.
This switch rewrites a master boot record without disturbing existing partition tables.
3
Select the command to reconstruct the missing or corrupted BCD file.
Chosen command: bootrec /rebuildbcd.
This switch scans volumes for installed operating systems and prompts to add them to the BCD configuration database.

Key Concept

Windows Recovery Environment (WinRE) Command-Line Diagnostics (bootrec)
Estimated Time:1m 30s
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Topics

Microsoft Command-Line Tools

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