Then you use bootsect /nt60 F: (where F: is your external drive) to write the Windows boot code onto it.
Locate your external hard drive in the list of available drives. Click Next to begin the download and formatting process. install windows from external hard drive
You plug the external hard drive into a working computer. It’s 500 GB, mostly empty. You know Windows setup won’t need all that space, but the drive has to be bootable. Then you use bootsect /nt60 F: (where F: