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Zorluk: OrtaTroubleshooting Windows OS Startup and Boot Errors

A user reports that after a sudden power outage, their legacy MBR-based Windows 10 computer fails to start and displays the message 'BOOTMGR is missing'. The technician boots the system using Windows installation media and accesses the Command Prompt in the Windows Recovery Environment (WinRE). Which command should the technician execute first to restore the Master Boot Record boot code?

  1. bootrec /fixmbrCevap
  2. B
    sfc /scannow
  3. C
    chkdsk /r
  4. D
    bootrec /rebuildbcd

Cevap

Execute the bootrec /fixmbr command in the WinRE Command Prompt.
Executing bootrec /fixmbr writes a Master Boot Record compatible with Windows 10 to the system partition without overwriting the existing partition table, resolving 'BOOTMGR is missing' errors caused by corrupted MBR boot code.

Adım Adım Çözüm

1
Boot the computer into the Windows Recovery Environment (WinRE) using bootable installation media.
The computer boots to the recovery options screen.
WinRE provides administrative tools, including Command Prompt, when the installed OS cannot boot.
2
Open Command Prompt and run bootrec /fixmbr.
The Master Boot Record (MBR) boot code is rewritten to the system partition.
Fixing the MBR restores the initial bootloader code required for BIOS to locate BOOTMGR.

Anahtar Kavram

Repairing MBR and Boot Code using Bootrec
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Konular

Troubleshooting Windows OS Startup and Boot Errors

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