For 29 years, all I kept around here are isos for building Windows VM, ..
but had to start scratching my head when I actually had to build an image
to build a laptop - neither Unetbootin, dd, nor imagewriter made a
bootable drive.
Ran across a really useful utility:
https://github.com/WoeUSB/WoeUSB
That actually makes a usable thumbdrive from a Windoze iso, ..