Slimdown11 – turn Windows 11 or LTSC 2024 into classic/legacy Windows

Discussion in 'Windows 11' started by SunLion, Mar 2, 2025.

  1. SunLion

    SunLion MDL Expert

    May 11, 2011
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    That's what I recommend too!
     
  2. SunLion

    SunLion MDL Expert

    May 11, 2011
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    #1803 SunLion, Jun 23, 2026
    Last edited: Jun 23, 2026
    (OP)
    =========================
    2xH2_Creator_16.6
    =========================
    Updated to 26x00.8655


    - Added option to copy or not WPI to the image
    - Added option for select the M.A.S. package to be included as the DEFAULT:
    1. TsForge
    2. HWID
    3. Do not include any M.A.S. packages in the image

    Regardless of whether the choice is 1 or 2:
    . When the created image is 25H2 IOT, is used TsForge
    . When the created image is 25H2 LTSC, is used TsForge + adjustment

    - Fixed the script _PreDownloadAllUpdates.cmd
    - Updated APPX files
    - Updated W10UI.cmd to v10.60
    - Other adjustments

    Test with:
    - pt-br_windows_11_enterprise_ltsc_2024_x64_dvd_2bb6b75b_2.iso
    - 26100.1742.240909-0928.GE_RELEASE_SVC_REFRESH_CLIENTBUSINESS_VOL_X64FRE_PT-BR.ISO



    =========================
    26H1_Creator_2.1
    =========================
    Updated to 28000.2269

    Edit 2026.06.23
    Reuploaded the package fixed



    https://forums.mydigitallife.net/threads/slimdown11-–-turn-windows-11-or-ltsc-2024-into-classic-legacy-windows.90039/#post-1872013


    Enjoy
     
  3. SunLion

    SunLion MDL Expert

    May 11, 2011
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    =========================
    2xH2_Creator_16.6
    =========================
    Update to 26x00.8737


    - Only the all.txt and LCU2.txt files have been updated

    1. Download the UUP_update.7z file and extract its contents into the 2xH2_Creator_16.6 folder.
    2. Run the extracted file "UUP_8737.exe" to update the UUP\all.txt and UUP\LCU2.txt files.
    3. Remove all updates .msu and .cab from the UUP folder.
    4. Run the _PreDownloadAllUpdates.cmd script to download the new updates.

    https://forums.mydigitallife.net/threads/slimdown11-–-turn-windows-11-or-ltsc-2024-into-classic-legacy-windows.90039/#post-1872013
     
  4. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    #1807 otvertka, Jun 28, 2026 at 19:03
    Last edited: Jun 28, 2026 at 19:14
    Yes, I know—I specifically enabled debug mode for testing. Since my other tests—24H2, 25H2, and 26H1—were all running updated versions, this time I tried the raw build 26100.1742 to save time, and I got the same result in all of them. There’s no issue on the virtual machine, but the disks are missing in the physical machine installation.


    I backed up the aStorVD / iaStorAC / stornvme / pciide / clfs / volmgr stack components currently installed on my computer, and I’m selecting them when prompted during installation, but unfortunately, it says the drivers are invalid.
     

    Attached Files:

  5. SunLion

    SunLion MDL Expert

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    #1808 SunLion, Jun 28, 2026 at 19:16
    Last edited: Jun 28, 2026 at 19:22
    (OP)
    Have you tried adding the autounattend.xml?

    How did you create your USB drive (Pendrive)?

    Keep in mind that the 2xH2_Creator_16.6 script is only for 24H2 and 25H2.

    For 26H1, the 26H1_Creator_2.1 script must be used.

    Try integrating the drivers into boot.wim 2 using the 2xH2_Creator_16.6 script.
     
  6. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    I’m using the ISO file with Ventoy. Yes, I didn’t add the drivers, but there’s an interesting situation: when I use the install.wim created for the 24h2 ISO to perform the installation, it installs without any issues. So, there seems to be a problem with the boot.wim file generated by my script. Thank you very much for your interest.
    I could try adding the drivers, but when I select them during installation, it rejects them, saying they’re not compatible—and these drivers are already installed on my PC right now.
     
  7. SunLion

    SunLion MDL Expert

    May 11, 2011
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    Personally, I don't use Ventoy.

    I prefer the script created by @rpo or Rufus.

    Try using @rpo's script; it's the one I use most often, and I haven't had any issues with it.

    https://forums.mydigitallife.net/th...secure-boot-bios-install-wim-over-4-gb.79268/
     
  8. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    I don’t know much about coding, so I’d like to ask: as far as I understand, the script doesn’t delete any drivers, and that’s enough for me. I’ll try some different alternatives—first Rufus instead of Ventoy, and then what you suggested. That’s fine. The only change I made was to undo the right-click menu changes—that’s it. Thank you; I’ll give it a try and let you know the results.
     
  9. SunLion

    SunLion MDL Expert

    May 11, 2011
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    That's right. The script doesn't remove any drivers. It simply gives you the option to integrate your drivers.
     
  10. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    That answer is enough for me—thank you. So I guess I have a different problem... I'm going to try something now.

    Yes, that was a big problem, Ventoy. The method you suggested solved the issue, and the installation screen successfully displayed all the disks.
    https://forums.mydigitallife.net/th...secure-boot-bios-install-wim-over-4-gb.79268/ This is great...
     
  11. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    #1814 otvertka, Jun 29, 2026 at 14:54
    Last edited: Jun 29, 2026 at 15:15
    I'm sorry, I think there's a mistake...
     
  12. SunLion

    SunLion MDL Expert

    May 11, 2011
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    Which error?
     
  13. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    SunLion, I’ve been testing things out—okay, I solved the problem yesterday, but Ventoy would have been great for me because all my ISO files are on a single USB drive... That’s why I’m still experimenting—there’s an issue with boot.wim because when I update using only W10UI and then merge the latest boot.wim from here with the install.wim I got from your script, the installation happens via Vento. I don’t understand why that happens. I think I can use it this way because install.wim works great.
     
  14. SunLion

    SunLion MDL Expert

    May 11, 2011
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    Yes, using Ventoy is an option for you.

    In our script, the boot.wim file is edited to work correctly after reducing the size of the 'sources' folder and to add the TPM bypass.
     
  15. Mavericks Choice

    Mavericks Choice MDL Guru

    Aug 5, 2015
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    @otvertka
    I too had trouble with some Win 11 boot.wim until I did the following:
    What I found with the later versions of Win 11 is that Setup client which calls setupprep.exe & setuphost.exe.
    To work around that: Mount boot.wim, and integrate this reg value to the SYSTEM hive:
    Code:

    [HKEY_LOCAL_MACHINE\SYSTEM\Setup]
    "CmdLine"="X:\\sources\\setup.exe"

    NOTE: Before you start to run any of the commands below, read the entire text. I am missing the specific details for the entry you want to add. If you can provide that to me, as described below, then I can nail down that one last command for you.

    DISM /mount-wim /wimfile:\Project\WinPE\boot.wim /index:1 /mountdir:\Project\Mount

    Note that I am mounting to D:\Project\Mount. Modify to fit your needs. If you change this, make sure to also do so for the other commands that follow.

    Next we load the registry "system" hive to a fictitious temp location, in this case I am using the name "offline"

    reg load HKLM\offline D:\project\mount\windows\system32\config\system

    Add the key:

    Note: You may need to refine this next line slightly. My apologies, but I'm not sure I understand what the <br> is. The idea here is that you have the system hive loaded to "offline" now. So in any "reg add" command, you would add it using the exact same command as on a live Windows system but substitute "offline" for "system". Here is a sample of how I would add the entry that bypasses the TPMCheck:

    EXAMPLE ONLY: reg add HKLM\offline\Setup\LabConfig /v BypassTPMCheck /t reg_dword /d 0x00000001 /f

    Here then is your line, but I seem to be missing details like if this should be a dword, string value, etc. If you can provide the details on this entry then I can help with the exact command. Bottom line is that the command below is not accurate and needs to be modified:

    reg add HKLM\offline\Setup\<br>"CmdLine"="X:\\sources\\setup.exe"

    Now we need to unload the "offline" hive:

    reg unload HKLM\offline

    Finally, we unmount and commit the changes:

    dism /unmount-image /mountdir:\project\mount /commit"

    Below is an example, putting all the above together, showing how I load the keys that bypass Windows 11 system requirements. Note that I repeat the exact same thing for index 2 in the boot.wim. In other words, I run the commands below twice but the second time I replace "index:1" with "index:2":

    DISM /mount-wim /wimfile:\Project\WinPE\boot.wim /index:1 /mountdir:\Project\Mount
    reg load HKLM\offline D:\project\mount\windows\system32\config\system
    reg add HKLM\offline\Setup\LabConfig /v BypassTPMCheck /t reg_dword /d 0x00000001 /f
    reg add HKLM\offline\Setup\LabConfig /v BypassSecureBootCheck /t reg_dword /d 0x00000001 /f
    reg add HKLM\offline\Setup\LabConfig /v BypassRAMCheck /t reg_dword /d 0x00000001 /f
    reg unload HKLM\offline
    dism /unmount-image /mountdir:\project\mount /commit"
     
  16. otvertka

    otvertka MDL Novice

    Aug 13, 2009
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    @Mavericks Choice,
    Thank you for your help. I took a look, but this script already does exactly what you described. For example, it redirects to the Setup.exe file here, but my problem isn’t with Setup.exe—it’s that it doesn’t recognize the drivers even though they’re installed. This might be a conflict with Ventoy.

    echo.
    echo.
    echo ============================================================
    echo Configuring Boot.wim 2
    echo ============================================================
    reg load HKLM\TEMP “MTBoot2\Windows\System32\config\SYSTEM”
    reg add HKLM\TEMP\Setup /v “CmdLine” /t REG_SZ /d “X:\\sources\\setup.exe” /f
    reg unload HKLM\TEMP
    echo.
    echo Done

    And here, it performs the BypassTPM operation

    echo.
    ECHO.
    ECHO ============================================================
    ECHO Add BypassTPM to Boot.wim 2
    ECHO ============================================================
    reg load HKLM\TK_SYSTEM “%BootMount%\Windows\System32\config\SYSTEM” >nul
    reg add “HKLM\TK_SYSTEM\Setup\LabConfig” /v ‘BypassTPMCheck’ /t REG_DWORD /d “1” /f
    reg add “HKLM\TK_SYSTEM\Setup\LabConfig” /v ‘BypassSecureBootCheck’ /t REG_DWORD /d “1” /f
    reg add “HKLM\TK_SYSTEM\Setup\LabConfig” /v ‘BypassRAMCheck’ /t REG_DWORD /d “1” /f
    reg add “HKLM\TK_SYSTEM\Setup\LabConfig” /v ‘BypassStorageCheck’ /t REG_DWORD /d “1” /f
    reg add “HKLM\TK_SYSTEM\Setup\LabConfig” /v ‘BypassCPUCheck’ /t REG_DWORD /d “1” /f
    reg add “HKLM\TK_SYSTEM\Setup\MoSetup” /v ‘AllowUpgradesWithUnsupportedTPMOrCPU’ /t REG_DWORD /d “1” /f
    reg Unload HKLM\TK_SYSTEM >nul

    The issue I'm having only occurs with Ventoy; there are no problems with others—Rufus, for example, works fine. So the script does a great job, but the boot.wim conflicts with Ventoy's drivers.
     
  17. shhnedo

    shhnedo MDL Guru

    Mar 20, 2011
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    This used to be an issue back in late 2021, early 2022. Use the latest version of ventoy and make sure you're using an up-to-date windows iso.