Boot to SD card reader, UEFI

[William Baker]

Hi there,

I have this old HP stream from a friend with 0 free storage, the only vacant port is an SD slot, the storage is soldered to the motherboard and there is one PCI-e x1 slot with a wifi card. I was hoping to boot to the SD by keeping the EFI partition on the internal storage and loading the OS from the SD, this looked promising but I'm getting "windows system32 winload.efi 0xc00000e the file is missing or corrupt". secure boot is disabled but something is stopping winload from being run, any ideas as to how to get round this? 

[homeap5]

I think that you cannot just load os from SD without some OS modifications, because Windows must load USB drivers first to use that card reader port. I think you can find somewhere on internet guide how to integrate USB drivers with OS loader.

I may be wrong of course, but that is what I heard and it's main reason why it's not so easy to install Winodws on external drives.

[William Baker]

Thanks for the advice, I've been trying to follow this http://codeabitwiser.com/2014/03/how-to-install-windows-7-with-only-usb-3-0-ports/ . But I cannot find any Boot.wim file not even when I force mount the EFI partition. Do you happen to know which Boot file loads boot drivers? Or do I have to install windows with installation media that has the modified boot.wim file?

[homeap5]

I never prepared USB bootable Windows, I never need it.