Windows/bcdedit
Use the bcdedit program to edit the boot menu:
bcdedit.exe
;Warning: Boot.ini is used on Windows XP and earlier operating systems. ;Warning: Use BCDEDIT.exe to modify Windows Vista boot options.
This is a command line tool which is difficult to use.
bcdedit displays the boot items in the order they appear.
default boot
Update default boot menu item:
bcdedit /default {ntldr} # boot to w2k3
bcdedit /default {current} # boot to latest installed OS
bcdedit /default {1d3642e1-15b2-11df-a272-8144e7b5b488} # boot to os specified by GUID
Rename item:
bcdedit /set {[ID]} description "[DESCRIPTION]"
bcdedit /set {ntldr} description "Windows Server 2003" # boot to w2k3
timeout
You can use the System Properties -> Advanced -> 'Startup and Recovery' to change the default boot OS and timeout.
Update timeout
bcdedit /timeout 30
Really long timeout:
bcdedit /timeout 999999
Note: There is no option for unlimited timeout
command line options
C:\>bcdedit /?
BCDEDIT - Boot Configuration Data Store Editor
The Bcdedit.exe command-line tool modifies the boot configuration data store.
The boot configuration data store contains boot configuration parameters and
controls how the operating system is booted. These parameters were previously
in the Boot.ini file (in BIOS-based operating systems) or in the nonvolatile
RAM entries (in Extensible Firmware Interface-based operating systems). You can
use Bcdedit.exe to add, delete, edit, and append entries in the boot
configuration data store.
For detailed command and option information, type bcdedit.exe /? <command>. For
example, to display detailed information about the /createstore command, type:
bcdedit.exe /? /createstore
For an alphabetical list of topics in this help file, run "bcdedit /? TOPICS".
Commands that operate on a store
================================
/createstore Creates a new and empty boot configuration data store.
/export Exports the contents of the system store to a file. This file
can be used later to restore the state of the system store.
/import Restores the state of the system store using a backup file
created with the /export command.
/sysstore Sets the system store device (only affects EFI systems, does
not persist across reboots, and is only used in cases where
the system store device is ambiguous).
Commands that operate on entries in a store
===========================================
/copy Makes copies of entries in the store.
/create Creates new entries in the store.
/delete Deletes entries from the store.
Run bcdedit /? ID for information about identifiers used by these commands.
Commands that operate on entry options
======================================
/deletevalue Deletes entry options from the store.
/set Sets entry option values in the store.
Run bcdedit /? TYPES for a list of datatypes used by these commands.
Run bcdedit /? FORMATS for a list of valid data formats.
Commands that control output
============================
/enum Lists entries in the store.
/v Command-line option that displays entry identifiers in full,
rather than using names for well-known identifiers.
Use /v by itself as a command to display entry identifiers
in full for the ACTIVE type.
Running "bcdedit" by itself is equivalent to running "bcdedit /enum ACTIVE".
Commands that control the boot manager
======================================
/bootsequence Sets the one-time boot sequence for the boot manager.
/default Sets the default entry that the boot manager will use.
/displayorder Sets the order in which the boot manager displays the
multiboot menu.
/timeout Sets the boot manager time-out value.
/toolsdisplayorder Sets the order in which the boot manager displays
the tools menu.
Commands that control Emergency Management Services for a boot application
==========================================================================
/bootems Enables or disables Emergency Management Services
for a boot application.
/ems Enables or disables Emergency Management Services for an
operating system entry.
/emssettings Sets the global Emergency Management Services parameters.
Command that control debugging
==============================
/bootdebug Enables or disables boot debugging for a boot application.
/dbgsettings Sets the global debugger parameters.
/debug Enables or disables kernel debugging for an operating system
entry.
/hypervisorsettings Sets the hypervisor parameters.
Restore Point on Failure
Default is "Recovery"
bcdedit /set displaymessageoverride SystemRestore
displaymessageoverride: 0 = Default 1 = Resume 2 = HyperV 3 = Recovery 4 = StartupRepair 5 = SystemImageRecovery 6 = CommandPrompt 7 = SystemRestore 8 = PushButtonReset
Ref: https://www.geoffchappell.com/notes/windows/boot/bcd/elements.htm
Disable PCIExpress Features
Disable support for PCIe Hotplug:
bcdedit /set pciexpress ForceDisable
notes
D:\>bcdedit The boot configuration data store could not be opened. The system cannot find the file specified.
D:\>bcdedit /store d:\boot The boot configuration data store could not be opened. The system has attempted to load or restore a file into the registry, but the sp ecified file is not in a registry file format.
D:\>bcdedit /enum The boot configuration data store could not be opened. The system cannot find the file specified.
D:\>bcdedit /enum /store d:\Boot The boot configuration data store could not be opened. The system has attempted to load or restore a file into the registry, but the sp ecified file is not in a registry file format.
D:\>bcdedit /enum /store d:\Boot\BCD
Windows Boot Manager
D:\>bcdedit /timeout 30 /enum /store d:\Boot\BCD
Invalid command line switch: /timeout
Run "bcdedit /?" for command line assistance.
D:\>bcdedit /timeout 30 /store d:\Boot\BCD The operation completed successfully.
bcdedit /default {ntldr} /store d:\Boot\BCD
bootcfg?
bootcfg - Clone setting: [1]
bootcfg /copy /ID 2 /d "Microsoft Windows XP Professional - new"
create new config: [2]
bcdedit /create /d "My Windows Vista" /application osloader
Read: (for fix broken w2k8)
- http://www.itechtalk.com/thread2386.html
- http://social.answers.microsoft.com/Forums/en-US/w7hardware/thread/6821a959-9c39-4f3d-8795-85415bd18f5e
- http://www.mydigitallife.info/2008/02/26/unable-to-disable-integrity-checks-cause-drivers-not-found-in-64-bit-vista-x64/
Enable Test Signing
bcdedit /set testsigning on
Disable Driver Integrity Checks
bcdedit /set loadoptions DISABLE_INTEGRITY_CHECKS
Alt Disable integrity checks: (ref: [3])
# bcdedit.exe /set nointegritychecks on # bcdedit.exe /set nointegritychecks true