The "Bootable" legacy ISO you've used is in fact not bootable, it relies on CDROM emulation provided by BIOS. VMs don't usually do this sort of emulation. If you set the guest OS to something like ...

The virtual machine may fail to boot from an ISO because the boot order prioritizes the virtual hard disk over the optical drive, resulting in a “No bootable medium ...

Oracle's Virtualbox is one of the more popular tools to set up and interact with virtual machines, not least because it's completely free, and it works cross-platform. Whether you're on Windows 11, ...