Windows 10 ISO: file system question

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  1. Posts : 18,432
    Windows 11 Pro
       #21

    And it seems like no matter how many safeguards are put into place to keep a user from doing something "unintentional", there is going to be user that figures out a way to get around it and wipe out a hard drive or SSD they did not want to!
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  2. Posts : 15,037
    Windows 10 IoT
       #22

    That pretty well sums it up.
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  3. Posts : 189
    Windows 10 Pro 64 bit
    Thread Starter
       #23

    I totally want to learn to avoid the MCT.

    I want to use the procedure explained for Disk part but in a graphical (safer) way.

    Is that possible?
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  4. Posts : 18,432
    Windows 11 Pro
       #24

    As long as the partition on the flash drive is FAT32 and marked as active, it should be good to go after you extract the files from the ISO file to it.
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  5. Posts : 189
    Windows 10 Pro 64 bit
    Thread Starter
       #25

    So we understood that for LEGACY and UEFI with SECURE BOOT ON we need:

    - FAT32
    - PRIMARY
    - ACTIVE
    - ISO extracted inside

    Also, we can use ANY program that allows us to make a partition ACTIVE.

    If that above is correct, my latest question is why is written everywhere to internet hat for LEGACY is needed a NTFS partition while for UEFI is needed a FAT32 partiton.

    I will make some experiments by myself (just now I am making one USB), but if you can help, I like to understand why around is written in that way.

    Thank you for you patiente.
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  6. Posts : 18,432
    Windows 11 Pro
       #26

    Pipppero2007 said:
    If that above is correct, my latest question is[B] why is written everywhere to internet hat for LEGACY is needed a NTFS partition while for UEFI is needed a FAT32 partiton.
    A legacy BIOS computer will boot from either the NTFS or FAT32 file system. Most UEFI computers will only boot from the FAT32 file system. So unless there is a specific need to overcome the 4GB single file size limit of FAT32, there is no reason to format the partition on the USB flash drive as NTFS because FAT32 will work in both legacy BIOS and UEFI computers.

    Legay BIOS computers require the partition on the USB flash drive to be marked as active in order to recognize it as bootable partition.

    UEFI computers only require the proper files to be in the partition on the USB flash drive to recognize it as bootable and it does not matter if the partition is marked as active or not.

    FAT32 = compatible with legacy BIOS computers and required by most UEFI computers. 4GB single file limit.
    Marked as active = compatible with UEFI computers and required by legacy BIOS computers.
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  7. Posts : 189
    Windows 10 Pro 64 bit
    Thread Starter
       #27

    SO clear thanks!

    Last thing: we must use always MBR, i am right?
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  8. Posts : 18,432
    Windows 11 Pro
       #28

    Pipppero2007 said:
    SO clear thanks!

    Last thing: we must use always MBR, i am right?
    On the USB flash drive, yes.
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  9. Posts : 189
    Windows 10 Pro 64 bit
    Thread Starter
       #29

    NavyLCDR said:
    On the USB flash drive, yes.
    I used to use "GPT for UEFI fat32" in case of UEFI bios, that's why that my question.

    Now I will test what I made in old LEGACY computer and in newer UEFI.

    Again thanks.
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