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
    3) LIST DISK
    4) SELECT DISK 7 (remember our example above)
    5) CLEAN
    7) ACTIVE
    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.

      My ComputerSystem Spec
  2.    01 Aug 2015 #2
    Join Date : Oct 2014
    Posts : 107
    Windows 10

    Quote Originally Posted by jimbo45 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.

    Quote Originally Posted by jimbo45 View Post
    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.

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

    - In Windows 8, mount the Windows 8 64-bit ISO image file by right-clicking the ISO image file and choosing Mount. If you don’t 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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