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Long story short, I have a Windows 10 tablet that's running 32-bit Windows 10. I'd like to install 32-bit Windows 7, but the tablet's BIOS is UEFI only and doesn't have legacy/CSM boot options.

Is there any way I can modify a 32-bit Windows 7 ISO to boot on 32-bit UEFI only systems like one can do with Linux ISOs and bootia32.efi?

If not, how can I boot a 64-bit Windows 7 on my tablet's 32-bit UEFI?

Tablet specs:

Insignia NS-P08W7100C

  • Intel ATOM CPU
  • 2GB RAM
  • 32GM EMMC
10

If not, how can I boot a 64 bit win 7 on my tablets 32 bit UEFI?

No; Your device came with Windows 8+ because only Windows 8+ supports a 32-Bit UEFI kernel. While your processor supports the 64-bit extension, Windows 7 32-bit cannot run on your device.

Only Windows 8+ supports booting a 64-bit operating system from a 32-bit UEFI kernel. What you want is not possible. I suggest using Windows 10 instead.

Is there any way I can modify a 32-bit win 7 iso to boot on 32-bit UEFI only systems like one can with Linux isos and a bootia32.efi?

No.

Q: Can Windows 7, Windows Vista, and Windows Server 2008 read, write, and boot from GPT disks?

A: Booting is only supported for 64-bit editions on UEFI-based systems.

Source: Answers about Windows disk support

Anyway I can remove the 64-bit system files on my iso/USB and replace them with the ones from the 32 bit while preserving the 64-bit EFI booting?

No

  • @phuclv I quoted Microsoft, not Wikipedia, so citation of Wikipedia isn’t necessary. Your comment is confusing. – Ramhound Jul 12 '18 at 15:02

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