Modded 2026-05 Monthly Rollup for Windows 8.1 Client & Embedded

Discussion in 'Windows 8' started by Apoly, Jun 29, 2026.

  1. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    #1 Apoly, Jun 29, 2026
    Last edited: Sep 18, 2026 at 12:32
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  2. NewEraCracker

    NewEraCracker MDL Senior Member

    Apr 19, 2011
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    Hi,

    I have not tried your approach, and this comment reflects only my two cents on the subject, without warranties, express, implied or otherwise.

    I wasn't aware that the newer server-only updates would modify the registry values when modded, and can confirm that your changes on SRVREMOVE.reg are okay and revert Client-mod 2026-05 to Client 2025-06 status registry-wise.

    I will evaluate if it's worthy to add SRVREMOVE.reg to my tutorial, as I've ran my systems without these changes reverted for about 9 months. Any additional documentation would be highly appreciated.

    My direct messages are open if you have any private feedback on these methods.

    Thank you.
     
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  3. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    #3 Apoly, Jun 29, 2026
    Last edited: Jun 29, 2026
    (OP)
    I also only found out about this when I started modding it recently.

    I don't think it's a big deal as Windows Client will also function with those keys.
    Plus there might also be other things that we still have to discover, we really are on uncharted territories with this kind of modding.

    The problem is also, I can't find any proper documentation for some keys such as the Autoboost one.
    I have no idea what it really does. It could be related to "Processor power management" options such as "Processor performance boost mode" ?? But not sure.
     
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  4. Vivonam2006

    Vivonam2006 MDL Novice

    Oct 20, 2024
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    Should I download and install both parts?
     
  5. olo320i

    olo320i MDL Junior Member

    Aug 17, 2016
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    Thank you for your work. I can confirm that your solution works on my dual boot (11/8) computer without any problem. How is your plan for future updates?
     
  6. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    Download both .part1 and .part2
    Then extract KB5087471_MOD.cab through .part1
    I had to split up the upload because of the large filesize

    Ideally verfiy the SHA256 checksum for KB5087471_MOD.cab to be sure
    It's indicated in the SHA256.txt file
     
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  7. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    Thanks for the feedback. For now I'm just looking for feedback and see if anything can be improved or needs to be fixed.

    So first I might only do a v2 of this mod. I've already noticed a few things here and there that can be improved.

    Other than that, it will depend if Premium Assurance gets released for Server 2012 R2
    I might release a modded LCU like every 6 months or so but nothing is set in stone yet.
     
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  8. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    KB5087471_MOD_v2 has been released

    Win32_TPM.dll.mui should now install correctly in all languages
    WMF4.0 mui files should now install correctly in all languages

    Restored 3 additional packages


    KB5087471_Mod_Scripts_v2 has been released
    Minor optimisations to the scripts and additional fail-safes implemented


    In case you are wondering, yes it's worth it to uninstall v1 and install v2 instead

    Recommended procedure :

    Right-click "Uninstall_Mod.cmd" and Run as an administrator

    Reboot into Windows 8.1 at least once to let Windows finish the uninstallation process.
    Then you can boot again into WinRE or W10/11 and install v2 and also use Scripts_v2
     
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  9. Vivonam2006

    Vivonam2006 MDL Novice

    Oct 20, 2024
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    #9 Vivonam2006, Jul 14, 2026
    Last edited by a moderator: Jul 15, 2026
    Version v2 experienced a problem that caused DLL and exe files to be downgraded (November 21, 2014).
     
  10. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    #10 Apoly, Jul 15, 2026
    Last edited: Jul 15, 2026
    (OP)
    False, v2 is converted to install as a Security-Only update just like v1 so it's not possible
    Only a Rollup would be able to downgrade files

    I have screenshotted your message in case you try to edit it again !
    Yesterday you posted a completely different message !
     
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  11. Vivonam2006

    Vivonam2006 MDL Novice

    Oct 20, 2024
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    So when will the July update be available?
     
  12. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    You are intentionally spreading false rumors and then you really expect me to answer your message as if nothing happened ?
    Plus, I already addressed potential future LCU in this thread so it seems clear that you never bothered to actually read anything in this thread.

    Good luck on this forum as you created a bad reputation for yourself. As for me, you are on my Ignore List with such catastrophic and irresponsible behaviour.
     
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  13. Vivonam2006

    Vivonam2006 MDL Novice

    Oct 20, 2024
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    I didn't mean to do that, I was just asking.
     
  14. Vivonam2006

    Vivonam2006 MDL Novice

    Oct 20, 2024
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    I encountered this BSOD error code 0xc000021a and I'm certain this v2 update is the main issue.
     
  15. Apoly

    Apoly MDL Senior Member

    Aug 21, 2016
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    I will be absent for 5-6 weeks. During this time I will not be able to respond to this thread.
    I recommend to use a Virtual Machine for testing to verify that everything works for you.

    Report any hostile intentions or nefarious messages if necessary ! Thank you !
     
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