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I've been trying to install Windows 8 on a UEFI-based computer using a USB flash drive. As far as I've have been able to gather, there have been some issues with this kind of installation, as the DVD images fail to boot in UEFI mode. Following this tutorial http://blog.thijssen.ch/2012/07/install-windows-8-in-uefi-mode.html, I've able to install from 64-bit only iso's, however I'd like to install from a AIO iso (only one available in my native language).

I've tried copying the bootx64.efi files from the /efi folder of a 64-bit image, but I get an error screen. Is there a way to fix/correct the iso image so that it can boot in UEFI mode?

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You need to use a 64-bit installation of Windows if you want to use a UEFI BIOS. Clearly trying to load a 64-bit .efi file won't work if your using a 32-bit operating system. –  Ramhound Apr 16 '13 at 12:08
The iso is not 32-bit only, it has both 64 and 32 bits installations... –  joaocandre Apr 16 '13 at 13:15

1 Answer 1

32Bit Windows versions don't support UEFI. I think this causes your issues. You can export (DISM /Export-Image) the 64Bt Install.WIM from your AIO Install.wim and only use the correct one.

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This seems to be what I'm looking for... and how would I do that? –  joaocandre Apr 16 '13 at 13:15
5s google: Dism /Export-Image /SourceImageFile:install.wim /SourceIndex:1 /DestinationImageFile:install2.wim Replace the index with the 64Bit Image you need. –  magicandre1981 Apr 16 '13 at 17:43
It doesn't work, apparently export-image is not a valid option... and what do you mean by the replacing the index? I only have one install.wim in my AIO DVD. –  joaocandre Apr 18 '13 at 19:04
this is correct, but a WIM can include several versions. The index specifies which version you want to use. Please learn a bit how this works, before asking such basic questions. –  magicandre1981 Apr 19 '13 at 3:53

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