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bcdboot c:\windows /f UEFI

Bcdboot - Bcd boot file creation and repair tool.

The bcdboot.exe command-line tool is used to copy critical boot files to the
system partition and to create a new system BCD store.

bcdboot <source> [/l <locale>] [/s <volume-letter> [/f <firmware>]] [/v]
                 [/vbcd] [/m [{OS Loader ID}]] [/addlast] [/p] [/c]
                 [/nofirmwaresync] [/description <description>]

source     Specifies the location of the windows system root.

/l         Specifies an optional locale parameter to use when
             initializing the BCD store. The default is US English.

/s         Specifies an optional volume letter parameter to designate
             the target system partition where boot environment files are
             copied.  The default is the system partition identified by
             the firmware.

/v         Enables verbose mode.

/vbcd      Enables BCD logging.

/m         If an OS loader GUID is provided, this option merges the
             given loader object with the system template to produce a
             bootable entry. Otherwise, only global objects are merged.

/d         Specifies that the existing default windows boot entry
             should be preserved.

/f         Used with the /s command, specifies the firmware type of the
             target system partition. Options for <firmware> are 'UEFI',
             'BIOS', or 'ALL'.

/t         Used with the /s and /f commands, specifies a target directory
             under the system partition where the boot environment files
             are to be copied. By default, the boot environment files are
             copied to the root of the target system partition.

/addlast   Specifies that the windows boot manager firmware entry
             should be added last. The default behavior is to add it
             first.

/nofirmwaresync Disable synchronization with firmware.

/bcdclean  Clean the BCD Store. By default, simply removes any duplicate
             entries in the BCD. Can be followed by 'full'. In this case,
             each entry is scanned. If the corresponding device for that entry
             does not exist, the entry is deleted.

/p         Specifies that the windows boot manager firmware entry
             position should be preserved. If entry does not exist,
             new entry will be added in the first position.

/c         Specifies that any existing objects described by the template
             should not be migrated.

/imageroot Specifies an image root under from the boot files originate. The bcd store of this
             image needs to be constructed with paths relative to the root of the image.

/bootex    Use the bootex binaries for servicing if necessary conditions are met.

/offline   Forces boot file servicing to be handled in an offline manner. Boot
             file selection is forced based on presence of 'bootex' switch.

Examples: bcdboot c:\windows /l en-us
          bcdboot c:\windows /s h:
          bcdboot c:\windows /s h: /f UEFI
          bcdboot c:\windows /s h: /f UEFI /t Configuration\Boot
          bcdboot c:\windows /m {d58d10c6-df53-11dc-878f-00064f4f4e08}
          bcdboot c:\windows /d /addlast
          bcdboot c:\windows /p
          bcdboot C:\Images\ImageRoot\Files\Windows /f UEFI /imageroot C:\Images\ImageRoot\Files

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