You have a server named Server1 that runs Windows Server 2012 R2.
You identify that the master boot record (MBR) is corrupt.
You need to repair the MBR.
Which tool should you use?
Repairing an unbootable Windows installation with bootrec.exe If the boot/recovery partition is corrupted or lost, you can modify your Windows OS partition to boot.
Boot from your Windows Vista/7/Server2008/R2/2012 media and choose the "Repair Windows" option.
Open the command prompt.
Using diskpart, mark your Windows partition as bootable.
If your windows partition does not have it, copy the "boot" folder from the installation media.
Run the following commands:
>attrib bcd -s -h -r
>ren c:\boot\bcd bcd.old
Reboot and Windows should boot normally. If not, return to the command prompt and run:
A: BCDEdit is a command-line tool for managing BCD stores. It can be used for a variety of purposes, including creating new stores, modifying existing stores,
adding boot menu options, and so on. BCDEdit serves essentially the same purpose as Bootcfg.exe on earlier versions of Windows
B: The BCDboot tool is a command-line tool that enables you to manage system partition files
D: Fixmbr is not a tool. Fixmbr is an option when using the bootrec tool.
References: Windows BCD Store