wblock@ said:Some machines don't show the USB boot option unless there's a bootable USB device attached. But some don't have it at all.
If you have an external USB drive adapter, the drive could be taken out of the desktop and attached to the laptop, FreeBSD installed on it, and then replaced. But it might be easier or cheaper to just find a working CDROM drive. They're pretty much free now, at least the non-recording ones.