Reducing the size of boot.wim with Minimal WinSxS.

Discussion in 'Windows 10' started by NiordFresh, Aug 21, 2025.

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  1. NiordFresh

    NiordFresh MDL Novice

    Aug 20, 2025
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    #1 NiordFresh, Aug 21, 2025
    Hello, can someone advise me which components in WinSxS I need to keep so that boot.wim doesn’t throw a BSOD during startup? I want to reduce boot.wim to the absolute minimum (below 200 MB). I know it’s possible to boot such an ISO, but I’m not really able to create one myself.
    I’m using the boot.wim from Windows 10 1809.
     
  2. ibay770

    ibay770 MDL Member

    Oct 9, 2015
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    #2 ibay770, Aug 22, 2025
    Ive been trying to figure this out myself. Ntite has some.magic sauce to figure it out.
     
  3. siliconbeaver

    siliconbeaver MDL Senior Member

    Apr 29, 2022
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    #3 siliconbeaver, Aug 22, 2025
    Last edited: Aug 22, 2025
    you can search SunLion's thread.

    For ID @balanadi, his post using using W10UI .mum method can shrink boot.wim as small as 120 MB. install.wim as less as 1.19 GB,

    upload_2025-8-22_14-45-8.png

    I was using SunLion/balanadi's method until it's abandoned (from SD10_Renewed_1.26).


    Simply saying, boot.wim below 200 MB is feasible.