Windows 10: Creating a bootable USB when you only have the contents of the ISO Solved

  1.    01 Aug 2015 #1

    Creating a bootable USB when you only have the contents of the ISO


    Hi there

    It's possible you might have the contents of the ISO but not the actual ISO image itself on HDD.

    It's still possible to create a bootable USB using purely MANUAL commands

    for this example assume Disk nr is 7 and the USB stick is on drive H. The files from the ISO are in say folder WINDVD on drive E

    here's what to do.

    1) open CMD as administrator
    2) DISKPART
    3) LIST DISK
    4) SELECT DISK 7 (remember our example above)
    5) CLEAN
    6) CREATE PARTITION PRIMARY
    7) ACTIVE
    8) FORMAT FS=NTFS QUICK
    9) EXIT (don't close the cmd prompt though)

    10) CD E:\WINDVD\BOOT (again from example contents of ISO are on drive E)
    11) BOOTSECT /NT60 H:

    12) After 11) finishes - takes 1 sec approx. copy the entire contents of directory WINDVD to the USB stick as is - copy contents in same folder layout as on the disk - don't have WINDVD as the high level - copy CONTENTS so ist folder on USB stick will be BOOT.

    13) now you've got a bootable USB.

    I know things like RUFUS make this automatically but if you've only got the extracted contents and don't want to download the whole iso again this should help.


    Cheers
    jimbo
      My ComputerSystem Spec

  2.    01 Aug 2015 #2

    jimbo45 said: View Post
    10) CD E:\WINDVD\BOOT (again from example contents of ISO are on drive E)
    11) BOOTSECT /NT60 H:
    You don't need this step.

    jimbo45 said: View Post
    8) FORMAT FS=NTFS QUICK
    This is a better command:

    format fs=fat32 quick

    Because then you have a UEFI Boot Mode AND Legacy BIOS Boot Mode compatible Windows 8/10 64-bit USB flash drive.

    Quote from this post:

    4. How to create UEFI Boot Mode and Legacy BIOS Boot Mode compatible Windows 8 64-bit USB flash drive.

    - Connect your USB flash drive.
    - Open a command prompt as administrator and type the following commands.

    diskpart
    list disk
    select disk # CAUTION: Replace # with your target USB flash drive.
    clean
    create partition primary
    format fs=fat32 quick
    active
    exit

    - In Windows 8, mount the Windows 8 64-bit ISO image file by right-clicking the ISO image file and choosing Mount. If you donít see Mount command from the context menu, go to Open with -> Windows Explorer instead.
    - Select everything in the mounted ISO image file, and copy them into the USB flash drive you prepared earlier.
      My ComputerSystem Spec


 

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