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BCDEdit /ems

The /ems option enables or disables Emergency Management Services (EMS) for the specified operating system boot entry.

    bcdedit /ems [{ID}] { on | off } 




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 { }.


InWindows Vista and later, use BCDEdit /emssettings command and its parameters to establish EMS settings for all boot entries. Then, use the BCDEdit /ems command to enable EMS for a particular boot entry.

EMS allows users to control particular components of a server remotely, even when the server is not connected to the network or to other standard remote-administration tools. For information about EMS, search for Emergency Management Services on the Microsoft TechNet website.


The following command enables EMS for a boot entry with the identifier of {49916baf-0e08-11db-9af4-000bdbd316a0}.

bcdedit /ems {49916baf-0e08-11db-9af4-000bdbd316a0} on



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