I am attempting to install Windows 10 x64 (64-bit) on a device that only has 32-bit UEFI (for the moment)
Since x64 Linux can be booted via a custom 32-bit GRUB.. I assume it could also do the same for windows, but "how to use grub to bypass a 32bit uefi to boot windows 10 x64" seems to indicate otherwise, though the explanation given does not completely explain why (to me at least).
I believe GRUB's 32-bit EFI SHOULD be able to load Window's 64-bit EFI.
Alternatively, is it possible to use grub's newish 'ntldr-mod' to run windows x64 install bootmgr? (howto start WINDOWS OS installation on hard disk with grub2)
This question will likely evolve based on the answers.
Answers/Comments regarding WHY will be flagged as off-topic. All i'm interested in is HOW. If your answer is 'not possible', PLEASE provide more info.
'Architectures must match' is not a valid answer.
reference links:
Possible to install 64-bit Windows on 32-bit UEFI?
[Solved] Chainload Windows8 UEFI with Grub2-efi
Windows installed in UEFI-GPT Mode menu entry
Can't boot a 64bit Windows USB from a tablet originally installed with 32-bit OS
Installing Ubuntu 14.10 (64-bit) on a Windows 8 bay trail atom tablet
How do I repair grub2 (not) booting 32-bit EFI on a 64-bit machine?
chainloader
). I haven't really seen anything can actually do that either. You should be noted that grub EFI does not load linux with the same module/command (linux
andinitrd
instead ofchainloader
).ntldr
command/module, it's only available under grub i386-pc (i.e. BIOS), and it can only load the BIOS version of Windows Boot Manager (or NTLDR). Although it's not possible with grub EFI, but AFAIK it's possible to load BIOS/MBR Windows with rEFInd. However, it's only limited to UEFI with CSM (which I doubt that will exist on those 32-bit UEFI).i386-pc
andi386-efi
), and that's grubi386-efi
. FWIW, when I saidgrub EFI
, I meant grubi386-efi
andx86_64-efi
in general.i386-pc
is for BIOS/CSM,i386-efi
is for 32-bit UEFI, andx86_64-efi
is for 64-bit UEFI.