Themken: I need to install Windows on two computers. I cannot seem to manage to install it on one. USB stick must be at least 8GB with nothing of value on it, USB 3 or later and formatted in the archaic FAT32 format and must use a USB3+ port. Still refuses to work.
Only time I had problems installing any Linux distro was when I tried to build my own using a wizard to guide me through the process.
Try this and use a partition manager:
https://www.ventoy.net/en/index.html I would keep tools separate, but you can use any combination in ventoy.
Single use like, MemTest or Gparted and add a combo if singles dont work like SystemRescue
https://www.system-rescue.org/disk-partitioning/Standard-partitioning-tools/
So, my point is. You can partition an unallocated space on a usb stick to burn a Windows iso to. You can also use Ventoy to add an iso to as is all those other tools. A one stick usb. So there are different methods to add images on one device, even with ntfs, fat32 and any other options.
Hope this helps.