Windows 8 and 8.1 Forums

Build bootable EFI USB from bootable third party ISO

  1. #1

    Build bootable EFI USB from bootable third party ISO

    I read the tutorial on building a Windows EFI USB stick from the Windows ISO. I want to build an EFI/USB from an ISO of a bootable third party application, which is not designed to boot from UEFI. First, I went through the steps in Diskpart. Then, I copied the files from the third party ISO to the USB stick. Screenshot 34 shows the objects listed from the third party ISO. The second screenshot (35) shows what I have on my Win 8.1 ISO. I tried to just copy the efi folder and bootmgr files from the Win 8 ISO, but my Win 8 system (a VM) didn't like that at all. Thanks!
    Attached Thumbnails Attached Thumbnails snap034.jpg   snap035.jpg  

      My System SpecsSystem Spec

  2. #2

    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1

    You need to be using a bootable software app, which uses WinRE4x64 for Windows 8/8.1, not a bootable software app, which is using WinRE1x32 for Windows XP.
      My System SpecsSystem Spec

  3. #3

      My System SpecsSystem Spec

Build bootable EFI USB from bootable third party ISO
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