Seungweon's Blog

Edit the Windows Vista Boot Menu Options - BCDEDIT

Click start>All Programs>Accessories>Right Click on Command Prompt and select Run As Administrator

Then type BCDedit.exe

Introduction

In Windows Vista, the Boot Configuration Data (BCD) store contains boot

configuration parameters which control how the operating system is started in

the Windows Vista and Windows Server Code Name "Longhorn" operating systems.

These were found in the boot.ini file in previous versions of Microsoft

Windows. To edit the Windows Vista Boot Menu Options, the Boot Configuration

Data Editor - BCDEDIT is used.

The Bcdedit.exe command-line tool can be used to add, delete and edit entries

in the BCD store which contains objects. Each object is identified by a GUID

(Globally Unique Identifier). Every drive or partition on the system will have

its own GUID and could be {legacy} (to describe a drive or partition on which a

pre-Windows Vista operating system), {default} (to describe the drive or

partition containing the current default operating system), or {current} (to

describe the current drive or partition one is booted to), or for example

{c34b751a-ff09-11d9-9e6e-0030482375e7} (to describe another drive or partition

on which an operating system has been installed).

Bcdedit.exe is located in the \Windows\System32 directory of the Windows Vista

partition and can be accessed only from the Commad Prompt which is found on

the Windows Vista start menu at Start>All Programs>Accessories


Command-line Help

bcdedit /? Shows all commands one is able to use

bcdedit.exe /? CREATESTORE Shows detailed information for the command

CREATESTORE or any other command available in bcdedit as shown when running

bcdedit /? followed by the particular command more information is required for.

bcdedit or bcdedit /enum all Shows the current structure of your boot

configuration data.
The GUID tags {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} of all Windows

installations present on your computer will be displayed.


Create a Backup

It is strongly recommended that one creates a backup of the BCD store before

making any changes to it.

bcdedit /export "D:\BCD Backup\Bcd Backup" Creates a backup to a pre-created

folder, in this case "BCD Backup" on drive D:

bcdedit /import "D:\BCD Backup\Bcd Backup" Restores the backup previously

created


Making Changes to the Boot Configuration Data

bcdedit /set {legacy} Description "Windows XP Professional SP2" Changes the

text description of the "Legacy" OS line in the boot menu. The quotation marks

must be included in the command

bcdedit /set {current} description "Windows Vista Build 5308 x86" Changes the

text of the boot menu line for the Vista or non-Vista installation one is

currently booted to, from the default "Microsoft Windows" or other description

to that shown in the quotation marks

bcdedit /set {5189b25c-5558-4bf2-bca4-289b11bd29e2} description "Windows Vista

Build 5270 x64" Changes the text of the boot menu line for any other Vista

installation. One must use the GUID for that particular installation as shown

when one runs the bcdedit or bcdedit /enum all command

bcdedit /default {current} Sets the current Windows installation one is booted

to as the default Windows boot OS

bcdedit /default {5189b25c-5558-4bf2-bca4-289b11bd29e2} Sets the referenced

Windows OS as the {default} Windows boot OS

bcdedit /default {legacy} Sets the legacy (Windows XP SP2) OS as {default} boot item

bcdedit /displayorder Sets the display order of boot menu items for example:

bcdedit.exe /displayorder {legacy} {current}

bcdedit /timeout 15 Changes the default 30 second time-out of the boot menu to

15 seconds or any other value inserted.


Correcting changes to the Partition/Disk structure

Where a partition or a hard drive has been added or removed and has caused the

partition/disk structure to change, this can be corrected by running these

commands in the order shown:

X:\>X:\boot\fixntfs.exe -lh -all (Where X: is the drive/partition on which the

folder "boot" is to be found)

bcdedit /set {5189b25c-5558-4bf2-bca4-289b11bd29e2} device partition=X: Changes

boot partition of the OS whose GUID is indicated. (Where X: is new

drive/partition required). Must be used together with the osdevice command

below

bcdedit /set {5189b25c-5558-4bf2-bca4-289b11bd29e2} osdevice partition=X:

Changes boot partition of the OS whose GUID is indicated. (Where X: is new

drive/partition required). Must be used together with the device command above


Msconfig - System Configuration Utility

The System Configuration Utility (msconfig) is accessible from the Windows

Vista start menu, Start>All Programs>Accessories>System Tools>System

Configuration. It has limited funcionality as regards the BCD store however,

with the only relevant functionalities being to change the default boot

operating system, to delete a boot menu item and to change the timeout display

period of the boot menu.

CAUTION: Making incorrect or invalid changes to one's BCD store can result in

the system no longer booting and only those comfortable with using command line

entries and who understand the inherent risks of making a mistake should do so.

-Seungweon