UEFI_MULTI - Make Multi-Boot USB-Drive. USB Multi-Boot of Linux ISO + Windows 10 VHD + Win10XPE in BIOS Or UEFI Secure mode. Make Bootable USB Drive with MBR and 2 Partitions. UEFI Secure boot support requires Format Drive using Grub2 as EFI Manager. Copy and Rename your Linux ISO files to folder images on FAT32 USB Boot drive U-BOOT.