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Zorluk: ZorTroubleshooting Windows OS Startup and Boot Errors

Following a hard drive replacement on a legacy MBR-based system, a technician restores a Windows 10 disk image to the new drive. Upon restarting, the system fails to load the operating system and displays a black screen stating 'BOOTMGR is missing'. Launching the Windows Recovery Environment (WinRE) Command Prompt reveals that the system partition is not flagged to boot and the Master Boot Record code is corrupted. Which TWO procedures should the technician execute from the WinRE command-line interface to resolve this boot failure? (Select TWO.)

  1. Run bootrec /fixmbr to rewrite the Master Boot Record on the system partition.Cevap
  2. Use the diskpart tool to select the system partition and execute the active command.Cevap
  3. C
    Run bootrec /rebuildbcd with the /f switch to force formatting of the boot sector.
  4. D
    Execute bcdedit /export to convert the MBR system volume into a UEFI System Partition.

Cevap

The correct procedures are executing 'bootrec /fixmbr' to repair the Master Boot Record and using 'diskpart' to mark the system partition as active.
On MBR legacy BIOS systems displaying 'BOOTMGR is missing' after disk imaging, two essential fixes are marking the target system partition as 'active' via diskpart so the BIOS identifies where boot code resides, and running 'bootrec /fixmbr' to write clean master boot code to the disk.

Adım Adım Çözüm

1
Identify the cause of the 'BOOTMGR is missing' error on an MBR system.
Recognize that both an invalid/inactive boot partition flag and corrupted MBR boot code prevent the system BIOS from finding the BOOTMGR file.
On legacy MBR setups, BIOS hands control to the MBR, which looks for the partition marked active to execute BOOTMGR.
2
Flag the system partition as active using DiskPart in WinRE.
Run diskpart, list/select the system volume, and issue the 'active' command to set the bootable flag.
Without an active partition, the system cannot locate the bootloader binaries upon system initialization.
3
Repair the Master Boot Record code using the Bootrec utility.
Execute 'bootrec /fixmbr' in the WinRE command prompt.
Writing a clean Master Boot Record fixes corrupted boot sector instructions without damaging partition table structures.

Anahtar Kavram

Legacy MBR Windows Startup Repair
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Troubleshooting Windows OS Startup and Boot Errors

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