MS-DOS and Windows command line bootsect command

Updated:
12/30/2021
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Computer Promise

The
bootsect
command updates the main boot code for hard disk partitions to switch between BOOTMGR and NTLDR. You can use this tool to restore the boot sector on your computer and information technology tin exist used for FAT and NTFS based file systems, replacing the FixFAT and FixNTFS tools.

Availability

Bootsect command is an external command available for the post-obit versions of Microsoft operating systems equally bootsec.exe.

  • Windows 2000
  • Windows XP
  • Windows Vista
  • Windows seven
  • Windows 8
  • Windows 10
  • Windows 11

Bootsect syntax

bootsect {/assist|/nt60|/nt52} {SYS|ALL|<DriveLetter>:} [/forcefulness] [/mbr]
Drive: The bulldoze letter to be searched.
/help Displays these usage instructions.
/nt52 Applies the principal boot code that is compatible with NTLDR to SYS, ALL, or <DriveLetter>. The operating arrangement installed on SYS, ALL, or <DriveLetter> must be older than Windows Vista.
/nt60 Applies the master boot code that is compatible with BOOTMGR to SYS, ALL, or <DriveLetter>. The operating system installed on SYS, ALL, or <DriveLetter> must be Windows Vista, Windows Server 2008 or subsequently.
SYS Updates the master kick code on the system division used to boot Windows.
ALL Updates the master boot lawmaking on all partitions. ALL does not necessarily update the boot lawmaking for each volume. Instead, this option updates the boot code on volumes that could be used as Windows boot volumes, which excludes any dynamic volumes non connected with an underlying disk partition. This brake is nowadays considering boot code must be located at the beginning of a disk partition.
<DriveLetter> Updates the master kick code on the volume associated with this drive letter. Boot lawmaking is not updated if either 1) <DriveLetter> is not associated with a book or 2) <DriveLetter> is associated with a volume not continued to an underlying disk division.
/force Forcibly dismounts the volume(south) during the kick lawmaking update. You should use this option with caution.

If Bootsect.exe cannot gain sectional book access, the file system may overwrite the kick code earlier the next reboot. Bootsect.exe e’er attempts to lock and dismount the volume before each update. When /force is specified, a forced dismount is attempted if the initial lock try fails. A lock tin fail, for case, if files on the target book are currently opened by other programs.

When successful, a forced dismount allows sectional book access and a reliable boot code update even though the initial lock failed. At the same fourth dimension, a forced dismount invalidates all open handles to files on the target book resulting in unexpected behavior from the programs that opened these files. Therefore, use this option with caution.

/mbr Updates the master boot record without changing the sectionalisation tabular array on sector 0 of the disk containing the partition specified by SYS, ALL, or drive alphabetic character. When used with /nt52 choice, the master kicking record is compatible with operating systems older than Windows Vista. When used with the /nt60 pick, the principal kicking tape is compatible with Windows Vista, Windows Server 2008 or afterwards.
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Bootsect examples

To utilise the principal boot code that is uniform with NTLDR to the volume labeled E:, use the following command:

bootsect /nt52 E: