This error means Ventoy started in but couldn’t locate a bootable file (usually \EFI\BOOT\BOOTX64.EFI or similar) on the ISO or inside the Ventoy partition.
Instead of using Ventoy’s default high-performance method to mount the ISO, it forces Ventoy to use a slower, more thorough, memory-based emulation. This often bypasses the "no boot file" detection because it tricks the ISO into thinking it is booting from a physical CD-ROM, not a virtual drive.
The error occurs in Ventoy when the system's UEFI firmware cannot find the necessary .efi bootloader files inside the ISO image you are trying to boot.
This signifies a compatibility break between how your physical machine's motherboard (UEFI) expects to start up and how the specific ISO file handles its boot sequence. 🔍 Root Causes 1. The ISO Lacks UEFI Support (Legacy Only)