Member Avatar for Ritesh_4

Hello,

Need some suggestions on how to combine 2 Windows 7 ISO files (one is x86 and other is x64), into one single bootable ISO file which can then be burnt on a DVD-R or Dual Layer DVD, and even on USB afterwards.

Thanks.

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If you want a single Win7 installer that works from DVD and USB without third‑party bundlers, you can do it with Microsoft’s own tools: merge the images with DISM, then build a BIOS+UEFI‑bootable ISO with oscdimg. Heads‑up: for UEFI installs you must use x64 boot files; x86 Win7 does not UEFI‑boot, and on most hardware you will need CSM enabled and Secure Boot off. (learn.microsoft.com)

Quick workflow (keeping x64 as the base so you retain EFI support):

  1. Extract both ISOs to C:\AIO\x86 and C:\AIO\x64, then copy the x64 tree to C:\AIO\build. Use an elevated “Deployment and Imaging Tools Environment” from the Windows ADK. (learn.microsoft.com)
  2. Build a combined install.wim (export only the editions you need to keep size down):
dism /Get-WimInfo /WimFile:C:\AIO\x64\sources\install.wim
dism /Export-Image /SourceImageFile:C:\AIO\x64\sources\install.wim /SourceIndex:1 ^
  /DestinationImageFile:C:\AIO\build\sources\install.wim /Compress:max /DestinationName:"Windows 7 Pro x64"
dism /Export-Image /SourceImageFile:C:\AIO\x86\sources\install.wim /SourceIndex:1 ^
  /DestinationImageFile:C:\AIO\build\sources\install.wim /Compress:max /DestinationName:"Windows 7 Pro x86"

DISM’s Export‑Image is the supported way to combine WIM indexes. (learn.microsoft.com)

  1. Optional: delete C:\AIO\build\sources\ei.cfg so Setup shows the available editions (otherwise it may auto‑select one). (systemscenter.ru)

  2. Create a BIOS+UEFI bootable ISO:

oscdimg -m -o -u2 -udfver102 -lWIN7AIO ^
  -bootdata:2#p0,e,bC:\AIO\build\boot\etfsboot.com#pEF,e,bC:\AIO\build\efi\microsoft\boot\efisys.bin ^
  C:\AIO\build C:\AIO\Win7-AIO.iso

This uses etfsboot.com for BIOS and efisys.bin for UEFI, as documented by Microsoft. Burn to DL DVD if it will not fit a single‑layer disc. (learn.microsoft.com)

Notes:

  • To install the x86 edition you must boot the 32‑bit setup; you cannot have a single disc that UEFI‑boots both x86 and x64. For UEFI‑only devices, the x64 path is the one that works. Tools like the USB route tried are often simpler than hand‑crafting dual‑arch boot menus. (learn.microsoft.com)
  • Windows 7 has been out of support since Jan 14, 2020; plan for security and driver constraints. (support.microsoft.com)

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Member Avatar for Ritesh_4

Found a tool as well, on the following link: WinUSB, which helped in creating a single installation file from 2 ISO to USB drive.

Still looking for one which can allow direct ISO creation and burn to DVD-R or DL...

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