UUP to ISO - Create Bootable ISO from Windows 10 Build Upgrade Files  

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  1. Posts : 17,661
    Windows 10 Pro
    Thread Starter
       #30

    Thanks for the update, good to know it works.

    Something important I want to say before any comments from those members of ours willing to split a hair whenever possible (yes, a global big forum like Ten Forums, we have members like that, too!):

    qilex said:
    Your script is working fine.
    Script / batch file is not mine, real credits shown in title bar when you launch the batch. I have only done some minor edits to make it as easy to use as possible, and written these instructions.

    Kari
      My Computer


  2. Posts : 56,823
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #31

    slicendice said:
    WOW, this new build converted to ISO is significantly smaller than the previous one (15007 - 4.17GB vs 15014 - 3.80GB). That is HUGE! A lot of cleanup has happened.

    Thanks Kari for the reminder about secureboot, I tend to forget that. Probably because I have not used Hyper-V for a while.
    Just a hunch on my part. MS ripped out a reasonably good chunk of telemetry code they no longer needed. Other code cleaning, too, I'm sure. Just a hunch......
      My Computers


  3. Posts : 4,666
    Windows 10 Pro x64 21H1 Build 19043.1151 (Branch: Release Preview)
       #32

    f14tomcat said:
    Just a hunch on my part. MS ripped out a reasonably good chunk of telemetry code they no longer needed. Other code cleaning, too, I'm sure. Just a hunch......
    I have this same hunch!

    ...speaking of ripping off components not needed anymore...do we have any good tutorial on this site for removing everything from a Windows installation that is not required. Similar to NTLite, but doing it all manually on an already running system?
      My Computers


  4. Posts : 17,661
    Windows 10 Pro
    Thread Starter
       #33

    Another oddity, an interesting fact is that ISO created from UUP files is over 200 MB smaller than one created from ESD (comparing EN-GB 15014 PRO images).

    Both images work perfectly, installing Windows 10 without a tiniest difference.
      My Computer


  5. Posts : 4,666
    Windows 10 Pro x64 21H1 Build 19043.1151 (Branch: Release Preview)
       #34

    I wonder if this has to do with the UUP converter re-compressing a lot more files with better compression settings than the ESD counterpart?


    UUP converter, re-compress a lot of .cab files to .esd before moving on.
      My Computers


  6. Posts : 56,823
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #35

    Kari said:
    Another oddity, an interesting fact is that ISO created from UUP files is over 200 MB smaller than one created from ESD (comparing EN-GB 15014 PRO images).

    Both images work perfectly, installing Windows 10 without a tiniest difference.
    Both same format? WIM or ESD?
      My Computers


  7. Posts : 17,661
    Windows 10 Pro
    Thread Starter
       #36

    f14tomcat said:
    Both same format? WIM or ESD?
    Both exactly the same WIM based ISO images.
      My Computer


  8. Posts : 4,666
    Windows 10 Pro x64 21H1 Build 19043.1151 (Branch: Release Preview)
       #37

    I think we should open up the two ISOs and do a file to file comparison to see what is different. Also taking a look inside the .wim could be a good idea. I bet some .cab files are smaller on the UUP version. Or maybe the .wim got better compression too?
      My Computers


  9. Posts : 56,823
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #38

    slicendice said:
    I think we should open up the two ISOs and do a file to file comparison to see what is different. Also taking a look inside the .wim could be a good idea. I bet some .cab files are smaller on the UUP version. Or maybe the .wim got better compression too?
    Go right ahead, we. :)
      My Computers


  10. Posts : 4,666
    Windows 10 Pro x64 21H1 Build 19043.1151 (Branch: Release Preview)
       #39

    I would do that, but I don't have any copy of the latest ISO converted using .ESD download, I don't even have the .ESD file, only have the UUP version.
      My Computers


 

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