MSMG ToolKit

do as @GreenGremlin suggested. That's all that's needed.

As to Windows 11 - I wouldn't touch it. It's garbage. I can't help you there.

But generally speaking, and I don't know your level of expertise here, you can apply updates manually by mounting your install.wim from 24h2/25h2 and then use dism /image /add-package to apply the update if that is all you are doing. Or you could using CodingWonder's DISMTools available at github.

 

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If all you want is updates of Windows 11 24H2 and 25H2 versions, just...[EDIT: save the text below as "UpdateWindows.cmd" and put it in a folder on your PC, along with your Windows .iso iand the helper file "oscdimg.exe", which you can get from inside the MSMG \Bin\x64\ or \Bin\x86 folders. Finally, put your updates in a subfolder names "updates" and execute the "UpdateWindows.cmd" as administsrator to slipstream your Windows updates into your .iso:

Code:

@echo off
setlocal enabledelayedexpansion
:: Automatically detect the folder where this script is running
set "WORK=%~dp0"
if "%WORK:~-1%"=="\" set "WORK=%WORK:~0,-1%"
:: Look for the first .iso file in the same folder as the script
set "ISO="
for %%I in ("%WORK%\*.iso") do (
    set "ISO=%%I"
    set "ISONAME=%%~nI"
    goto :FoundISO
)
:FoundISO
if "%ISO%"=="" (
    echo ERROR: No .iso file found in "%WORK%"
    echo Please place your ISO in this folder and try again.
    pause
    exit /b 1
)
:: Define the subfolders dynamically
set "MOUNT=%WORK%\Mount"
set "EXTRACT=%WORK%\XISO"
set "UPDATES=%WORK%\updates"
set "OUTPUT=%WORK%\%ISONAME%_Updated.iso"
:: Create the required directories if they don't exist
mkdir "%MOUNT%" 2>nul
mkdir "%EXTRACT%" 2>nul
mkdir "%UPDATES%" 2>nul
:: ---------------------------------------------------------------
:: Mount ISO (no .ESD) and wait until the drive letter is available
:: ---------------------------------------------------------------
echo Mounting ISO...
powershell -NoProfile -Command "Mount-DiskImage -ImagePath '%ISO%'"
echo Waiting for drive letter...
:WAITDRIVE
powershell -NoProfile -Command ^
    "$dl = (Get-DiskImage '%ISO%' | Get-Volume).DriveLetter; if (-not $dl) { exit 1 }"
if errorlevel 1 (
    timeout /t 2 /nobreak >nul
    goto WAITDRIVE
)
for /f "usebackq" %%i in (`powershell -NoProfile -Command ^
    "(Get-DiskImage '%ISO%' | Get-Volume).DriveLetter"`) do set DRIVE=%%i:
echo ISO mounted at %DRIVE%
:: ---------------------------------------------------------------
:: Verify install.wim exists before proceeding
:: ---------------------------------------------------------------
echo Copying files from ISO...
xcopy "%DRIVE%\*" "%EXTRACT%\" /E /H /Y
powershell -NoProfile -Command "Dismount-DiskImage -ImagePath '%ISO%'"
if not exist "%EXTRACT%\sources\install.wim" (
    echo.
    echo ERROR: install.wim not found in %EXTRACT%\sources\
    echo The copy from the ISO may have failed. Check that xcopy completed without errors.
    pause
    exit /b 1
)
:: ---------------------------------------------------------------
:: Show available indexes
:: ---------------------------------------------------------------
echo.
echo Showing indexes in install.wim...
dism /Get-WimInfo /WimFile:"%EXTRACT%\sources\install.wim"
echo.
set /p INDEX=Enter the index number to service:
:: ---------------------------------------------------------------
:: Clean up any leftover mounts from prior runs
:: ---------------------------------------------------------------
echo.
echo Cleaning up stale mounts...
dism /Cleanup-Wim
:: ---------------------------------------------------------------
:: Mount the WIM
:: ---------------------------------------------------------------
echo.
echo Mounting image index %INDEX%...
dism /Mount-Wim ^
    /WimFile:"%EXTRACT%\sources\install.wim" ^
    /Index:%INDEX% ^
    /MountDir:"%MOUNT%"
if errorlevel 1 (
    echo ERROR: DISM failed to mount the WIM. Check the DISM log at %%windir%%\Logs\DISM\dism.log
    pause
    exit /b 1
)
:: ---------------------------------------------------------------
:: Apply updates
:: ---------------------------------------------------------------
echo.
echo Applying updates from %UPDATES%...
for %%f in ("%UPDATES%\*.msu") do (
    echo.
    echo Installing: %%f
    dism /Image:"%MOUNT%" /Add-Package /PackagePath:"%%f"
)
:: ---------------------------------------------------------------
:: Commit and unmount
:: ---------------------------------------------------------------
echo.
echo Committing changes...
dism /Unmount-Wim /MountDir:"%MOUNT%" /Commit
if errorlevel 1 (
    echo ERROR: Commit failed. The mount directory may still be active.
    echo Run:  dism /Unmount-Wim /MountDir:"%MOUNT%" /Discard
    pause
    exit /b 1
)
:: ---------------------------------------------------------------
:: Rebuild the ISO
:: ---------------------------------------------------------------
echo.
echo Creating updated ISO...
"%WORK%\oscdimg.exe" -m -o -u2 -udfver102 ^
    -bootdata:2#p0,e,b"%EXTRACT%\boot\etfsboot.com"#pEF,e,b"%EXTRACT%\efi\microsoft\boot\efisys.bin" ^
    "%EXTRACT%" "%OUTPUT%"
if errorlevel 1 (
    echo ERROR: oscdimg failed to create the ISO.
    pause
    exit /b 1
)
echo.
echo Done! Output ISO: %OUTPUT%
pause

 

Thanks for this

 

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