Create a UEFI partition
You can add the built-in Create UEFI Partitions pre-installation task, which uses a DiskPart script, to create a Unified Extensible Firmware Interface (UEFI) hard drive partition on Windows 7 x64 SP1 or higher x64 UEFI-enabled devices.
1. On the left navigation pane, click Library to expand the section, then click Pre-installation Tasks to display the Pre-installation Tasks page.
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4. The KACE Boot Environment (KBE) automatically identifies the hidden EFI partition while capturing the UEFI image, and assigns the drive letter S during the capture.
5. Use the Apply UEFI Partition mid-level task to apply the partition.