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====== Information ======

  * How to use DISM to slipstream updates to install media
  * :!: Apparently the latest SSU needs to be slipstreamed and committed first, and then the latest CU slipstreamed afterwards
  * https://www.tenforums.com/installation-upgrade/134686-offline-image-update-files-outside-install-wim.html

====== Requirements ======

  * Windows 10 image extracted to ''%UserProfile%\Downloads\W10''
  * ''install.wim'' at ''%UserProfile%\Downloads\W10\sources\install.wim''
  * About 30GB of disk space to be safe

====== Get Indexes ======

  * LTSB 2016 and LTSC 2019 seems to have only one Index
  * :!: If more than one Index is present, be sure to change commands below and only select the wanted Index

  dism.exe /Get-WimInfo /wimFile:"%UserProfile%\Downloads\W10\sources\install.wim"

====== Extract Index ======

  * With ''Win10_2004_English_x64'', Index 10 is Pro for Workstations

  dism.exe /Export-Image /SourceImageFile:"%UserProfile%\Downloads\W10\sources\install.wim" /SourceIndex:"10" /DestinationImageFile:"%UserProfile%\Downloads\install.wim"

===== Verify Index =====

****

  dism.exe /Get-WimInfo /wimFile:"%UserProfile%\Downloads\install.wim"

====== Create Directories ======

****

  mkdir "%UserProfile%\Downloads\mounted-wim" "%UserProfile%\Downloads\update-packages" "%UserProfile%\Downloads\temp-export"

====== Mount WIM ======

****

  dism.exe /Mount-WIM /wimFile:"%UserProfile%\Downloads\install.wim" /index:"1" /MountDir:"%UserProfile%\Downloads\mounted-wim"

====== Add Updates to WIM ======

  * Updates should be copied to ''%UserProfile%\Downloads\update-packages'' prior to running
  * :!: The latest SSU needs to be installed and committed, and the process needs repeated in order to integrate the latest CU

  dism.exe /image:"%UserProfile%\Downloads\mounted-wim" /Add-Package /PackagePath:"%UserProfile%\Downloads\update-packages"

====== Cleanup WIM ======

****

  dism.exe /image:"%UserProfile%\Downloads\mounted-wim" /Cleanup-Image /StartComponentCleanup /ResetBase

====== Check Updates in WIM ======

****

  dism.exe /Get-Packages /image:"%UserProfile%\Downloads\mounted-wim"

====== Commit Changes to WIM ======

****

  dism.exe /Unmount-wim /mountdir:"%UserProfile%\Downloads\mounted-wim" /commit

====== Compress WIM ======

  * Need to manually copy the new ''install.wim'' to Install media sources folder
  * :!: If ''install.wim'' is ever above 4GB even after the compress, using Rufus to create a NTFS bootable USB flash drive is required

  dism.exe /Export-Image /SourceImageFile:"%UserProfile%\Downloads\install.wim" /SourceIndex:"1" /DestinationImageFile:"%UserProfile%\Downloads\temp-export\install.wim" /Compress:"maximum"