

If you haven’t selected the virtual hard disk as a boot device in the boot order list or the disk boot image contains lower boot priority, you can get the no bootable medium found VirtualBox fatal error. The boot order in the VM settings is incorrect.If you insert the bootable disc into the virtual optical drive of VM incorrectly, the VirtualBox fatal no bootable medium found error can occur. Since some fragments of the ISO image are coincidently located on bad blocks of the hard disk, the ISO image will be unreadable.

In some cases, you cannot boot the VM from an ISO image if it is stored a damaged hard disk drive.
