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?
- bootrec /fixmbrAnswer
- Bsfc /scannow
- Cchkdsk /r
- Dbootrec /rebuildbcd
Answer
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.
Step-by-Step Solution
Key Concept
Repairing MBR and Boot Code using Bootrec