If you see the "fatal error" more than once, abandon ISO boot and switch to Netinstall. It is faster and more reliable for full installations.
This error is almost always a hardware compatibility or configuration issue rather than a corrupt ISO file. It means the MikroTik kernel has booted, but it lacks the necessary drivers or BIOS permissions to "see" the drive containing the installation files. 1. Physical Hardware Solutions Check SATA/IDE Mode in BIOS
: Remove existing CD-ROM and Hard Disk entries from SATA controllers and re-add them under an IDE Controller
Requires a MikroTik RouterBOARD or a specific ethernet chip (Realtek/Intel). Does not work on random PC hardware.
Note: This works on legacy BIOS systems, not always on UEFI.
