This command enables or disables Emergency Management Services for the specified entry. bcdedit /bootems { ON | OFF } Specifies ...

This command enables or disables Emergency Management Services for the specified entry.  bcdedit /bootems [] { ON | OFF }          Specifies the identifier of the entry to be modified. Although this             command will work for any entry, it is only effective for boot             applications.  Example:  The following command enables Emergency Management Services for the boot manager:      bcdedit /bootems {bootmgr} ON