I set up a new virtual machine using Microsoft’s new scripts.
Then I captured an image from the virtual machine with FOG and multicast it to four computers, and they all UEFI booted fine.
CreatePartitions-UEFI.txt puts the system partition first, instead of the recovery tools partition. This supports @george1421’s theory that FOG was confused when it found the recovery tools in the first partition, instead of the EFI (“System”) partition.
Thank you for your help!
rem == CreatePartitions-UEFI.txt == rem == These commands are used with DiskPart to rem create four partitions rem for a UEFI/GPT-based PC. rem Adjust the partition sizes to fill the drive rem as necessary. == select disk 0 clean convert gpt rem == 1. System partition ========================= create partition efi size=100 rem ** NOTE: For Advanced Format 4Kn drives, rem change this value to size = 260 ** format quick fs=fat32 label="System" assign letter="S" rem == 2. Microsoft Reserved (MSR) partition ======= create partition msr size=16 rem == 3. Windows partition ======================== rem == a. Create the Windows partition ========== create partition primary rem == b. Create space for the recovery tools === rem ** Update this size to match the size of rem the recovery tools (winre.wim) rem plus some free space. shrink minimum=500 rem == c. Prepare the Windows partition ========= format quick fs=ntfs label="Windows" assign letter="W" rem === 4. Recovery partition ====================== create partition primary format quick fs=ntfs label="Recovery" assign letter="R" set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac" gpt attributes=0x8000000000000001 list volume exit