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Difficulty: HardMicrosoft Command-Line Tools

A system administrator is troubleshooting a Windows 11 workstation that fails to start after an improper shutdown. The system displays the startup error "BOOTMGR is missing." Diagnostic scans confirm that the physical drive is functional, but the Master Boot Record (MBR) is corrupted and the Boot Configuration Data (BCD) store is missing valid OS installation paths. Which of the following commands executed from the Windows Recovery Environment (WinRE) Command Prompt are required to resolve both issues? (Select TWO.)

  1. bootrec /fixmbrAnswer
  2. bootrec /rebuildbcdAnswer
  3. C
    bootcfg /rebuild
  4. D
    fsck -f

Answer

The administrator must run 'bootrec /fixmbr' to repair the damaged Master Boot Record and 'bootrec /rebuildbcd' to locate Windows installations and reconstruct the missing BCD store entries.
To resolve MBR corruption and missing BCD configuration settings on modern Windows systems, technicians use bootrec.exe in WinRE. The switch '/fixmbr' writes a master boot record to the system partition, fixing initial boot code corruption. The switch '/rebuildbcd' scans all disks for valid Windows installations and rebuilds the BCD store so BOOTMGR can launch the operating system successfully.

Step-by-Step Solution

1
Identify the primary boot components damaged according to the symptoms.
Corrupted Master Boot Record (MBR) and missing/damaged Boot Configuration Data (BCD).
The error message 'BOOTMGR is missing' alongside boot sector corruption requires targeting both the partition boot code/MBR and the BCD store.
2
Execute 'bootrec /fixmbr' from the WinRE command prompt.
Rewrites the master boot code to the system partition without overwriting existing partition tables.
Resolves MBR boot loader code corruption.
3
Execute 'bootrec /rebuildbcd' from the WinRE command prompt.
Scans connected drives for compatible Windows installations and prompts to add them to the BCD store.
Restores missing boot menu choices and BCD registry entries required for BOOTMGR to locate the OS.

Key Concept

Windows Boot Recovery Utility (bootrec.exe)
Estimated Time:2m 0s
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Topics

Microsoft Command-Line Tools

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