- Create VFAT partition on a USB Drive
- On USB create a directory EFI with BOOT subdirectory
- Download ZIP file with Drive Erase Utility
- Extract ZIP file and place .EFI file into BOOT directory
- Check the computer boots from "UEFI first" (combined mode with "Legacy first" mode may not work)
- Place the USB into port, boot and follow on-screen instructions
Read more about FDE - Full Disk Encryption.