Best way to make a new VHD from a Windows 10 ISO

[romf]

The following additional parameters come to my mind:

• I am using normal VHD-files because I don't need an operating system install that exceeds 128GB.
  
• At the moment I set a size of 60GB maximum at creation time, that is enough for a small installation of Windows 10.
  
• I use dynamic disks so that their size gets reduced when they are not actively booted from.
  
• At the moment I did not play around with parent or child images and not using any disk encryption.
  
• The disk is formatted with Ventoy. The Ventoy-partition created by Ventoy I had to format with NTFS.
  

So yes, maybe some check routine prevents Windows 10 to complete its installation process inside a VHD. That's what I have guessed as well because the problem occurs on two different computers using two different Windows 10 ISOs as source for the new VHD. The problem can easily be reproduced following the steps mentioned in the very first post of this thread.