Edit Boot Options Windows 7 Noexecute Optin Factory Reset

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If your computer develops a problem, perform a Windows System Restore before performing a system restore. The Microsoft System Restore function returns the computer to a previously chosen restore point, which resets all of the settings for the operating system to those settings that existed at the time the restore point was created. Part 2: Steps to Reset Windows 7 Computer without Installation Disk/ Disc. After you back up the data in your Windows 7 that will do a factory reset, now go ahead to try to use System Restore in Safe Mode to factory reset Windows 7 without a CD, please walk through the in-depth tutorials to get the answer. Learn about the Advanced Boot Options available to get your computer going if it won’t start normally. Show Notes: http://helpfulvideotips.com/pdfs/AdvancedB.

Edit Boot Options for Windows 7. Hard Disk: 74aba7c9 /NOEXECUTE=OPTIN. Enter=Submit, Esc=Cancel???? I can select the primary boot drive in the bios, but last time I did that (on another laptop) it messed up my HDD. So would rather just select a temp boot device than change the default. Also, not sure which is the right usb to.

When do you need to restore Windows 7?

System restore from Command Prompt in Windows 7 is a quite useful action when your system hascrashed or cannot boot. Most users would like to restore system from a system backup instead of reinstalling Windows.

Reinstalling system is a time-consuming process, for it wipes all your files and programs. Incomparison, system restore requires less time, for it just withdraws unwanted changes andreverts Windows to an earlier date when everything was working fine.

In addition, when you buy a new computer and want to keep the old system, you can restore the oldsystem to the new computer. In this way, you can transfer everything from the old systemto the new computer. There’s no need for you to reinstall your frequently-used applications.

There are three methods to perform System Restore from Command Prompt in Windows 7:

Launch System Restore from Command Prompt in System Recovery Options

When it comes to system restore with command line when Windows cannot boot, what comes tomind first is System Recovery Options Command Prompt in Windows 7. It is true. However, ifyou use “wbadmin start recovery” command, you will get the following error:

Optin

“Warning: The START RECOVERY command is not supported in this version of Windows.”

That is because some of the sub-commands of Wbadmin are only available for server, and“wbadmin start recovery” is one of them. This command is used to restorefiles/volumes/applications that were backed up using Windows Server Backup.

Luckily, you can open System Restore by another command:

1. Open CMD in System Recovery Options, type rstrui.exe and press Enter.This command will open System Restore wizard immediately.

2. Choose a restore point and click Next. Follow the instruction to completesystem restore.

Launch System Restore via Safe Mode with Command Prompt

There is still another way to launch System Restore. You can go to Safe Mode with CommandPrompt:

1. Restart your computer. During the start process, repeatedly press F8until Windows Advanced Boot Options appears. Select Safe Mode with CommandPrompt and press Enter.

2. When you get into the Command Prompt window, type cd restore and pressEnter. Then type rstrui.exe and press Enter. Then you will launch theSystem Restore wizard and you can follow the wizard to complete restore process.

Restore Windows 7 with AOMEI Backupper.exe

AOMEI Backupper Professional is trustablebackup and restore software. It enables you to backup and restore the system either fromgraphic user interface or command line. The best part is you can restore system todissimilar hardware using the Universal Restore feature. Besides,it supports both 32 bit and 64 bit of Windows 10/8.1/8/7/Vista/XP.

Some requiredparameters:
● {/r}: restore the backup of system, disk, partition or dynamicvolume.
● {/t} {system disk part}: specify restore type.
● {/s}{D:my backupmybackup.adi 192.168.1.1.my backupmy backup.adi}: specify the path of the imagefile.
● {/x}: specify universal restore to restore system to dissimilar hardware. It hasto be used with '/t system' and '/t disk'.

AOMEI Backupper restore is based on AOMEI Backupper backup. That is to say, if you want toperform system restore with AOMEI Backupper, you must create a system imagebackup by AOMEI Backupper in advance. To make the restore process smooth, you cancheck if system image backup is intact and without error by using the CheckImage feature.

Let’s see the detailed steps to run system restore from Command Prompt in Windows 7 withAOMEI Backupper.

Step 1. Click 'Start' and type CMD to open the Command Prompt. Right click 'cmd'and select 'Run as administrator'.

Step 2. Navigate to AOMEI Backupper installation directory by typing the following commandand press Enter:

cd [installation path of AOMEI Backupper] (e.g., cd C:Program Files(x86)AOMEI Backupper)

Step 3. Type the following command and press Enter to start restore:

AMBackup /r /t [backup type] /s '[backup location path]' /d [destinationlocation]

For example:

① To restore the system image “systembackup1.adi” saved in J:systembackup to disk 1. Thecommand should be: AMBackup /r /t system /s “J:system backupsystembackup1.adi” /d 1.

② To restore the system image “systembackup1.adi” saved in D:system backup to partition 0 ondisk 0 and perform universal restore. The command should be: AMBackup /r /t system /s 'D:systembackupsystembackup1.adi' /d 0:0 /x.

Notes:
● To run systemrestore when Windows fails to boot, you should create bootable media with AOMEI Backupper toboot your machine. It will bring you to the main interface of AOMEI Backupper. You can openCommand Prompt from Tools > Windows shell command andthen type the commands mentioned above to perform system restore.
● If you run thecommands under Windows PE, the drive letters might change.

Restore with AOMEI Backupper GUI

If there is nothing wrong with your Windows 7, you just want to restore it to a specificpoint to uninstall some programs or migrate system to another disk, like SSD or somethingalike. You do not have to run system restore from Command Prompt in Windows 7, you can alsocarry out the operations by directly launch this software's graphic user interface inWindows:

Click Restore and Select Task > Choose the system backuptask from the list > Select to restore the entire system or a partition > (Optional)Choose a destination path to restore the system image to > Click StartRestore. It is quite easy and you can make it with only a few clicks.

Conclusion

Now you know how to run system restore from Command Prompt in Windows 7. AOMEI Backupperoffers you both command line operations and GUI operations. You can also use it to runsystem restore via command lines in Windows 10. Besides system backup & recovery, AOMEIBackupper is also excellent disk clone software. With it, you can clone hard drives and migrate Windows 7 to SSDeasily.

If you want to protect unlimited computers within your company, you can pick AOMEI Backupper Technician. With the inbuiltAOMEI Image Deploy tool, you are also allowed to deploy/restore system image file onserver-side computer to multiple client-side computers over network.

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The BCDEdit /set command sets a boot entry option value in the Windows boot configuration data store (BCD). Use the BCDEdit /set command to configure specific boot entry elements, such as kernel debugger settings, memory options, or options that enable test-signed kernel-mode code or load alternate hardware abstraction layer (HAL) and kernel files. To remove a boot entry option, use the BCDEdit /deletevalue command.

Caution

Administrative privileges are required to use BCDEdit to modify BCD. Changing some boot entry options using the BCDEdit /set command could render your computer inoperable. As an alternative, use the System Configuration utility (MSConfig.exe) to change boot settings.

Note

Before setting BCDEdit options you might need to disable or suspend BitLocker and Secure Boot on the computer.

Alternatives to BCDEdit

Settings startup options

Tip

To avoid the risk associated with using BCDEdit, consider using an alternative method to perform boot configuration

Startup Settings

Some common boot options such as enabling debugging mode are available in the start up options. In Windows 10, the settings can be accessed in Settings, Update and Security, select Recovery. Under Advanced startup, select Restart Now. When the PC reboots, select Startup options. Then select Troubleshoot > Advanced options > Startup Settings , then select Restart button. When the PC restarts, you will be able to set the available startup options.

System Configuration Utility

Use the System Configuration Utility (MSConfig.exe) instead of BCDEdit when possible. For more information, see How to open MSConfig in Windows 10.

Syntax

Parameters

[{ID}]
The {ID} is the GUID that is associated with the boot entry. If you do not specify an {ID}, the command modifies the current operating system boot entry. If a boot entry is specified, the GUID associated with the boot entry must be enclosed in braces { }. To view the GUID identifiers for all of the active boot entries, use the bcdedit /enum command. The identifier for the current boot entry is {current}. For more information about this option, use the following command: bcdedit /? ID

Note

If you are using Windows PowerShell, you must use quotes around the boot entry identifier, for example: '{49916baf-0e08-11db-9af4-000bdbd316a0}' or '{current}'.

datatypevalue

Use the command line help to view options

Use the command line help for BCDEdit to display information available for a specific version of Windows.

The following sections describe some common datatypes and their associated values.

Boot Settings

bootlog [ yesno ]
Enables the system initialization log. This log is stored in the Ntbtlog.txt file in the %WINDIR% directory. It includes a list of loaded and unloaded drivers in text format.

bootmenupolicy [ LegacyStandard ]
Defines the type of boot menu the system will use. ForWindows 10, Windows 8.1, Windows 8 and Windows RT the default is Standard. For Windows Server 2012 R2, Windows Server 2012, the default is Legacy. When Legacy is selected, the Advanced options menu (F8) is available. When Standard is selected, the boot menu appears but only under certain conditions: for example, if there is a startup failure, if you are booting up from a repair disk or installation media, if you have configured multiple boot entries, or if you manually configured the computer to use Advanced startup. When Standard is selected, the F8 key is ignored during boot. Windows 8 PCs start up quickly so there isn't enough time to press F8. For more information, see Windows Startup Settings (including safe mode).

Note

The option is available starting with Windows 8 and Windows Server 2012. You can also use the onetimeadvancedoptions to use the Advanced options (F8) menu (Legacy) one time on the next boot.

bootstatuspolicypolicy

Controls the boot status policy. The boot status policy can be one of the following:

Boot Status PolicyDescription
DisplayAllFailuresDisplays all errors if there is a failed boot, failed shutdown, or failed checkpoint. The computer will fail over to the Windows recovery environment on reboot.
IgnoreAllFailuresIgnore errors if there is a failed boot, failed shutdown, or failed checkpoint. The computer will attempt to boot normally after an error occurs.
IgnoreShutdownFailuresOnly ignore errors if there is a failed shutdown. If there is a failed shutdown, the computer does not automatically fail over to the Windows recovery environment on reboot. This is the default setting for Windows 8.
IgnoreBootFailuresOnly ignore errors if there is a failed boot. If there is a failed boot, the computer does not automatically fail over to the Windows recovery environment on reboot.
IgnoreCheckpointFailuresOnly ignore errors if there is a failed checkpoint. If there is a failed checkpoint, the computer does not automatically fail over to the Windows recovery environment on reboot. The option is available starting with Windows 8 and Windows Server 2012.
DisplayShutdownFailuresDisplays errors if there is a failed shutdown. If there is a failed shutdown, the computer will fail over to the Windows recovery environment on reboot. Ignores boot failures and failed checkpoints. The option is available starting with Windows 8 and Windows Server 2012.
DisplayBootFailuresDisplays errors if there is a failed boot. If there is a failed boot, the computer will fail over to the Windows recovery environment on reboot. Ignores shutdown failures and failed checkpoints. The option is available starting with Windows 8 and Windows Server 2012.
DisplayCheckpointFailuresDisplays errors if there is a failed checkpoint. If there is a failed checkpoint, the computer will fail over to the Windows recovery environment on reboot. Ignores boot and shutdown failures. The option is available starting with Windows 8 and Windows Server 2012.

quietboot [ onoff ]
Controls the display of a high-resolution bitmap in place of the Windows boot screen display and animation.

Note

Do not use the quietboot option in Windows 8 as it will prevent the display of bug check data in addition to all boot graphics.

sos [ onoff ]
Controls the display of the names of the drivers as they load during the boot process. Use sos on to display the names. Use sos off to suppress the display.

lastknowngood [ onoff ]
Enables boot to last known good configuration.

nocrashautoreboot [ onoff ]
Disables automatic restart on crash.

resumeobject (id)
Defines the identifier of the resume object that is associated with this operating system object.

safebootalternateshell [ onoff ]
Uses the alternate shell when booted into Safe mode.

winpe [ onoff ]
Enables the computer to boot to Windows PE.

onetimeadvancedoptions [ onoff ]
Controls whether the system boots to the legacy menu (F8 menu) on the next boot.

Display Settings

bootuxdisabled [ onoff ]
Disables boot graphics.

graphicsmodedisabled [ onoff ]
Indicates whether graphics mode is disabled and boot applications must use text mode display.

graphicsresolution
Defines the graphics resolution, 1024x768, 800x600,1024x600, etc.

highestmode [ onoff ]
Enables boot applications to use the highest graphical mode exposed by the firmware.

novga [ onoff ]
Disables the use of VGA modes entirely.

vga [ onoff ]
Forces the use of the VGA display driver.

Hardware Abstraction Layer (HAL) & KERNEL

halfile
Directs the operating system loader to load an alternate HAL file. The specified file must be located in the %SystemRoot%system32 directory.

kernelfile
Directs the operating system loader to load an alternate kernel. The specified file must be located in the %SystemRoot%system32 directory.

Verification Settings

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testsigning [ onoff ]
Controls whether Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2008, or Windows Vista will load any type of test-signed kernel-mode code. This option is not set by default, which means test-signed kernel-mode drivers on 64-bit versions of Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2008, and Windows Vista will not load by default. After you run the BCDEdit command, restart the computer so that the change takes effect. For more information, see Introduction to Test-Signing

nointegritychecks [ onoff ]Disables integrity checks. Cannot be set when secure boot is enabled. This value is ignored by Windows 7 and Windows 8.

disableelamdrivers [ yesno ]
Controls the loading of Early Launch Antimalware (ELAM) drivers. The OS loader removes this entry for security reasons. This option can only be triggered by using the F8 menu. Someone must be physically present (at the computer) to trigger this option.

Note

This option should only be used for debugging.

nx [Optin OptOut AlwaysOn AlwaysOff]
Enables, disables, and configures Data Execution Prevention (DEP), a set of hardware and software technologies designed to prevent harmful code from running in protected memory locations. For information about DEP settings, see Data Execution Prevention.

DEP OptionDescription
OptinEnables DEP only for operating system components, including the Windows kernel and drivers. Administrators can enable DEP on selected executable files by using the Application Compatibility Toolkit (ACT).
OptoutEnables DEP for the operating system and all processes, including the Windows kernel and drivers. However, administrators can disable DEP on selected executable files by using System in Control Panel.
AlwaysOnEnables DEP for the operating system and all processes, including the Windows kernel and drivers. All attempts to disable DEP are ignored.
AlwaysOffDisables DEP. Attempts to enable DEP selectively are ignored. On Windows Vista, this parameter also disables Physical Address Extension (PAE). This parameter does not disable PAE on Windows Server 2008.

Processor Settings

groupsizemaxsize
Sets the maximum number of logical processors in a single processor group, where maxsize is any power of 2 between 1 and 64 inclusive. By default, processor groups have a maximum size of 64 logical processors. You can use this boot configuration setting to override the size and makeup of a computer's processor groups for testing purposes. Processor groups provide support for computers with greater than 64 logical processors. This boot option is available on 64-bit versions of Windows 7 and Windows Server 2008 R2 and later versions. This boot option has no effect on the 32-bit versions of Windows 7.

Use the groupsize option if you want to force multiple groups and the computer has 64 or fewer active logical processors. For more information about using this option, see Boot Parameters to Test Drivers for Multiple Processor Group Support.

groupaware [ onoff ]
Forces drivers to be aware of multiple groups in a multiple processor group environment. Use this option to help expose cross-group incompatibilities in drivers and components. Processor groups provide support for computers with greater than 64 logical processors. This boot option is available on 64-bit versions of Windows 7 and Windows Server 2008 R2 and later versions. This boot option has no effect on the 32-bit versions of Windows 7. You can use the groupaware option and the groupsize option to test driver compatibility to function with multiple groups when computer has 64 or fewer active logical processors.

The groupaware on setting ensures that processes are started in a group other than group 0. This increases the chances of cross-group interaction between drivers and components. The option also modifies the behavior of the legacy functions, KeSetTargetProcessorDpc, KeSetSystemAffinityThreadEx, and KeRevertToUserAffinityThreadEx, so that they always operate on the highest numbered group that contains active logical processors. Drivers that call any of these legacy functions should be changed to call their group-aware counterparts (KeSetTargetProcessorDpcEx, KeSetSystemGroupAffinityThread, and KeRevertToUserGroupAffinityThread).

For more information about using this option, see Boot Parameters to Test Drivers for Multiple Processor Group Support.

maxgroup [ onoff ]
Maximizes the number of groups created in a processor group configuration. The maxgroup on setting assigns NUMA nodes to groups in a manner that maximizes the number of groups for a particular computer. The number of groups created is either the number of NUMA nodes the computer has, or the maximum number of groups supported by this version of Windows, whichever is smaller. The default behavior (maxgroup off) is to pack the NUMA nodes tightly into as few groups as possible.

Use the maxgroup option if you want to use multiple groups, the computer has 64 or fewer active logical processors, and the computer already has multiple NUMA nodes. This option can also be used to alter the default group configuration of a computer that has more than 64 logical processors.

Processor groups provide support for computers with greater than 64 logical processors. This option is available on 64-bit versions of Windows 7 and Windows Server 2008 R2 and later versions. This boot option has no effect on the 32-bit versions of Windows 7.

For more information about using this option, see Boot Parameters to Test Drivers for Multiple Processor Group Support.

onecpu [ onoff ]
Forces only the boot CPU to be used in a computer that has more than one logical processor. For example, the following command configures the current operating system loader to use one processor.

Memory Related Settings

increaseuservaMegabytes
Specifies the amount of memory, in megabytes, for user-mode virtual address space.

On 32-bit editions of Windows, applications have 4 gigabyte (GB) of virtual address space available. The virtual address space is divided so that 2 GB is available to the application and the other 2 GB is available only to the system.

The 4-gigabyte tuning feature, enabled with the increaseuserva option, allows you to increase the virtual address space that is available to the application up to 3 GB, which reduces the amount available to the system to between 1 and 2 GB. The BCEdit /set increaseuservaMegabytes command can specify any value between 2048 (2 GB) and 3072 (3 GB) megabytes in decimal notation. Windows uses the remaining address space (4 GB minus the specified amount) as its kernel-mode address space.

See 4-Gigabyte Tuning (Windows) for additional information about this feature.

nolowmem [ onoff ]Controls the use of low memory. When nolowmem on is specified, this option loads the operating system, device drivers, and all applications into addresses above the 4 GB boundary, and directs Windows to allocate all memory pools at addresses above the 4 GB boundary. Note that the nolowmem option is ignored in Windows 8, Windows Server 2012, and later versions of Windows.

pae [ DefaultForceEnableForceDisable ]
Enables or disables Physical Address Extension (PAE). When PAE is enabled, the system loads the PAE version of the Windows kernel.

The pae parameter is valid only on boot entries for 32-bit versions of Windows that run on computers with x86-based and x64-based processors. On 32-bit versions of Windows (prior to Windows 8) , PAE is disabled by default. However, Windows automatically enables PAE when the computer is configured for hot-add memory devices in memory ranges beyond the 4 GB region, as defined by the Static Resource Affinity Table (SRAT). Hot-add memory supports memory devices that you can add without rebooting or turning off the computer. In this case, because PAE must be enabled when the system starts, it is enabled automatically so that the system can immediately address extended memory that is added between restarts. Hot-add memory is supported only on Windows Server 2008, Datacenter Edition; Windows Server 2008 for Itanium-Based Systems; and on the datacenter and enterprise editions of all later versions of Windows Server. Moreover, for versions of Windows prior to Windows Server 2008, hot-add memory is supported only on computers with an ACPI BIOS, an x86 processor, and specialized hardware. For Windows Server 2008 and later versions of Windows Server, it is supported for all processor architectures.

On a computer that supports hardware-enabled Data Execution Prevention (DEP) and is running a 32-bit version of the Windows operating system that supports DEP, PAE is automatically enabled when DEP is enabled and, on all 32-bit versions of the Windows operating system, except Windows Server 2003 with SP1, PAE is disabled when you disable DEP. To enable PAE when DEP is disabled, you must enable PAE explicitly, by using /set nx AlwaysOff and /set pae ForceEnable. For more information about DEP, see Boot Parameters to Configure DEP and PAE.

Edit

For more information about using the pae parameter and the other parameters that affect PAE configuration, see Boot Parameters to Configure DEP and PAE.

removememoryMegabytes
Removes memory from the total available memory that the operating system can use.

For example, the following command removes 256 MB of memory from the total available to the operating system associated with the specified boot entry.

truncatememoryaddressLimits the amount of physical memory available to Windows. When you use this option, Windows ignores all memory at or above the specified physical address. Specify the address in bytes.

For example, the following command sets the physical address limit at 1 GB. You can specify the address in decimal (1073741824) or hexadecimal (0x40000000).

Additional Settings

disabledynamictick [ yesno ]
Enables and disables dynamic timer tick feature.

Note

This option should only be used for debugging.

forcelegacyplatform [ yesno ]
Forces the OS to assume the presence of legacy PC devices like CMOS and keyboard controllers.

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Note

This option should only be used for debugging.

pciexpress [ defaultforcedisable]
Enables or disables PCI Express functionality. If the computer platform supports the PCI Express features and the ACPI _OSC method grants control of the features to the operating system, Windows enables the advanced features through the PCI Express Native Control feature (this is the default). Use the forcedisable option to override the advanced PCI Express features and use legacy PCI Express behavior. For more information, see Enabling PCI Express Native Control in Windows.

tpmbootentropy [ defaultForceEnableForceDisable]
Determines whether entropy is gathered from the trusted platform module (TPM) to help seed the random number generator in the operating system.

tscsyncpolicy [ DefaultLegacyEnhanced ]
Controls the times stamp counter synchronization policy. This option should only be used for debugging.

usefirmwarepcisettings [ yesno ]
Enables or disables the use of BIOS-configured peripheral component interconnect (PCI) resources.

useplatformclock [ yesno ]
Forces the use of the platform clock as the system's performance counter.

Note

This option should only be used for debugging.

uselegacyapicmode [ yesno ]
Used to force legacy APIC mode, even if the processors and chipset support extended APIC mode.

useplatformtick [ yesno ]
Forces the clock to be backed by a platform source, no synthetic timers are allowed. The option is available starting in Windows 8 and Windows Server 2012.

Note

This option should only be used for debugging.

xsavedisable [ 01 ]
When set to a value other than zero (0), disables XSAVE processor functionality in the kernel.

x2apicpolicy [ enabledisable ]
Enables or disables the use of extended APIC mode, if supported. The system defaults to using extended APIC mode if it is available.

Debugger Settings

To work with the debugger settings, use the following commands.

CommandDescription
BCDEdit /bootdebugThe /bootdebug boot option enables or disables boot debugging of the current or specified Windows operating system boot entry.
BCDEdit /dbgsettingsThe /dbgsettings option sets or displays the current global debugger settings for the computer. To enable or disable the kernel debugger, use the BCDEdit /debug option.
BCDEdit /debugThe /debug boot option enables or disables kernel debugging of the Windows operating system associated with the specified boot entry or the current boot entry.

Hypervisor Debugger Settings

Use the BCDEdit / hypervisorsettings option to set or display the hypervisor debugger settings for the system. For more information, see BCDEdit /hypervisorsettings.

hypervisordebug [ OnOff ]
Controls whether the hypervisor debugger is enabled.

Hypervisor Settings

hypervisoriommupolicy [ defaultenabledisable]
Controls whether the hypervisor uses an Input Output Memory Management Unit (IOMMU).

hypervisorlaunchtype [ OffAuto ]
Controls the hypervisor launch options. If you are setting up a debugger to debug Hyper-V on a target computer, set this option to Auto on the target computer. For more information, see Create a Virtual Machine with Hyper-V.

hypervisorloadoptions NOFORCESNOOP [ YesNo ]
Specifies whether the hypervisor should enforce snoop control on system IOMMUs.

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hypervisornumprocnumber
Specifies the total number of logical processors that can be started in the hypervisor.

hypervisorrootprocnumber
Specifies the maximum number of virtual processors in the root partition and limits the number of post-split Non-Uniform Memory Architecture (NUMA) nodes which can have logical processors started in the hypervisor.

hypervisorrootprocpernodenumber
Specifies the total number of virtual processors in the root partition that can be started within a pre-split Non-Uniform Memory Architecture (NUMA) node.

hypervisoruselargevtlb [ yesno]
Increases virtual Translation Lookaside Buffer (TLB) size.

Emergency Management Services

The BCDEdit /ems option enables or disables Emergency Management Services (EMS) for the specified operating system boot entry. For more information, see BCDEdit /ems.

The BCDEdit /emssettings option sets the global Emergency Management Services (EMS) settings for the computer. For more information, see For more information, see BCDEdit /emssettings.

Event Logging

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The BCDEdit /event command enables or disables the remote event logging for the specified boot entry. For more information, see BCDEdit /event.

For more information about specific BCD elements and boot options, you can use the commands BCDEdit /? OSLOADER and BCDEdit /? TYPES OSLOADER.

To view the current boot entries and their settings, use the bcdedit /enum command. This command displays the active boot entries and their associated globally unique identifiers (GUID). Use the identifiers with the /set command to configure options for a specific boot entry.

To delete a boot option value that you have set, use the /deletevalue option. The syntax for the command is as follows:

bcdedit /deletevalue [{ID}] datatatype

For example, if you change the processor group option, groupsize, to a new value for testing purposes, you can revert to the default value of 64 by typing the following command and then restarting the computer.

Any change to a boot option requires a restart to take effect. For information about commonly used BCDEdit commands, see Boot Configuration Data Editor Frequently Asked Questions.

Requirements

Minimum supported client: Windows Vista

Minimum supported server: Windows Server 2008

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See also