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Hi LaddanatorThis is already discussed in the topic http://theoven.org/index.php?topic=457.0Zanaffer is able to boot Win8PE via UEFI. You should build a 64 bit Win8PE for that. 32 Bit won't supported in UEFI.
Just a tip, if you want to test EFI but lack the hardware, with Vmware you can open up the vmx file with notepad and add firmware= "efi" to the second line. Voila, it thinks its an efi bios.
oscdimg.exe -b"E:\_Win8PE_SE_Dev_x64\ISO\WIM\efi\microsoft\boot\efisys.bin" -pEF -m -n -l"Win8PESE" "E:\_Win8PE_SE_Dev_x64\ISO\WIM" "E:\_Win8PE_SE_Dev_x64\ISO\Win8PE_x64.ISO"
There is a trick to add g4d to the BCD so when you boot to your UEFI USB drive, it will list two options, Win8PE SE and Grub4Dos (or whatever you name this option) and you highlight which to boot to. I have not successfully tested this method. Just got my hands on an Win 8 Asus with secure boot last night and I will be running test today. Will report back with more info.
Copy the \efi\microsoft\boot directory up 1 level to \efi\boot and copy bootmgfw.efi from Windows\Boot\EFI to \efi\boot then rename it bootx64.efi.
With the trick to add g4d to the BCD, once you do it with success, a little tutorial from your experience would be nice
Will 32 bit programs run under Win8PE SE 64bit? Never used a 64bit PE so never tested this.
That being said, i have never (knowingly) used secure boot, but googled it and read a bit about it just now. From what i have read, im not 100% sure if it is something you have to activate, or if it is in the bios firmware by default. Assuming its in the bios, and my bios has it, i have been able to install linux, windows, grub4dos and syslinux under mbr legacy mode, and windows in efi. When booting from an efi file, in my case refinds bootx64.efi, it will boot (chainload?) any efi file i direct the refinf.conf to. My whole config file looks like this, and it may explain a few of its capabilities better than i can. Chameleon efi bootloader for macs may also help do things outside the box.
Ill send you my boot and efi directory i use from usb if you want to carry on experimenting what i have put together. Placing grub4dos in the efi\boot dir may help, ill goof around with some paths.