Let me message a friend, he should be able to figure it out if he has the time. I really cant think of anything besides having the boot priority set up properly...when it is set to Windows boot manager it should post after the UEFI, then in the top left the white cursor blinks a few times then the OS will load. Have you unplugged all other bootable media when you set the boot priority in the UEFI?
You have created all the partitions needed right? The MSR, ESP, and the main correct?
I have mine set up fine under GPT atm and never had an issue.