you many not have been able to get it to work on certain hardware, but i have had no trouble whatsoever on any manufacturers' machines i've tried thus far with real hardware--vhd or virtualization is not something i've need it for. i haven't taken the time to check your links, but my method works flawlessly if directions are followed.
two methods are possible:
***for both methods, a proper WinPE 10 is to be desired with all the optional ADK packages installed to make this simpler and to be able to use third party tools correctly if you do like i do***
Method 1--For doing a manual, clean install of windows 10 on mbr hdd but booting uefi
(1) create one primary fat32 partition at the first of the mbr disk (NOT msr, NOT uefi in diskpart), set active, and make sure it is 200mb or more in size--mine is several GBs for example
(2) create one primary partition that windows 10 will reside on, format it ntfs--should not matter where it is located on disk as long as it is not first
(3) dism / gimagex apply the install.wim from your install media to the windows ntfs partition that was just created
***for this to work you will need windows 10 install media build 10240--other build versions i have tried, the manual install function is broken and won't complete setup at first boot; build 10240 works without a hitch for me everytime***
**if for some reason you receive a message at first boot that setup cannot complete then go to the next method--this is likely if using an AMD processor and some Intel iCores**
(4) dism / gimagex apply my efi.wim to the fat32 partition created earlier--you could just copy the files from the install media too if you want, i've just made it into a wim for easy apply
http://www.mediafire...arl/EFI_BCD.wim
(5) edit efi/microsoft/boot/bcd to point to the winload.efi of the windows install you just applied--i used bootice for this (see attached pic for specifics)
http://www.mediafire...99g/attach.png#
(6) now reboot your machine and go into your bios settings
(7) with secure boot on, and legacy support off, your new mbr windows install should boot into uefi mode on first boot and a new uefi entry will be added to your bios boot configuration
(8) one can also boot uefi with secure boot off, legacy support set to hybrid or legacy as long as legacy still supports booting uefi--each machine is different in this regard
(9) fastboot may be an issue for some--turn it off if for some reason your system doesn't boot--i have not had issues with it
Method 2--For Using an Existing Install (whether in uefi/gpt or legacy/mbr mode, doesn't matter)
(1) dism / gimagex capture a current x64 install (legacy or uefi) and delete the /boot folder from the wim if legacy and apply changes
(2) create one primary fat32 partition at the first of the mbr disk (not msr, not uefi in diskpart), set active, size doesn't matter just as long as it is at least 200mb or more,
(3) create the partition that your windows install will reside on (or format it if using the existing partition) and format it ntfs
(4) dism / gimagex apply the wim of your windows install captured earlier to this ntfs partition
(5) next apply my efi.wim to the fat32 partition created earlier
http://www.mediafire...arl/EFI_BCD.wim
(6) edit efi/microsoft/boot/bcd to point to the winload.efi of the windows install you just applied--i used bootice for this (see attached pic for the specifics)
http://www.mediafire...99g/attach.png#
(7) now reboot your machine and go into your bios settings
(8) with secure boot on, and legacy support off, your new mbr windows install should boot into uefi mode on first boot and a new uefi entry will be added to your bios boot configuration
(9) one can also boot uefi with secure boot off, legacy support set to hybrid or legacy as long as legacy still supports booting uefi--each machine is different in this regard.
(10) fastboot may be an issue for some--turn it off if for some reason your system doesn't boot--i have not had issues with it
These are just the simple directions to achieve uefi boot on mbr disk in Windows 10 that I have used with success over and over again. Any skilled person will find easier ways around imaging as i've outlined in my steps above, but i figure it's best to keep it simple for those less inclined.
anyone who has questions, feel free to ask, but it's most likely answered above...
thanks, enjoy, and stayboogy
Edited by stayboogy, 13 April 2016 - 03:22 AM.