Just tried that and it did not fix the problem. The issue seems to be that it does not like the partition that was created??
I also don't understand why it is asking me to convert it to a dynamic volume and then install XP, I thought XP had to install to a simple volume???
Diskpart must have change between Win8 and WIn10.
If it is not the MBR and not the PBR code (and I presume it is not the non-cylinder-bound offset and size) then it could be:
1) some pre-existing data at the end of the disk? (dynamic disks - not entirely unlike GPT - have some info written at the very end of the disk) But it would make no sense, if it happened to both you and your user.
2) something in the NTFS itself?
Anyway, I seem to remember that XP/2003 could be installed to *some types* of Dynamic Disk (though noone or next to noone ever did that).
What do you have with list disk and detail disk (like here):
https://www.partitio...amic-disk-4.png
Try doing the following.
create the partition via diskpart of the windows 10 PE
boot to another "good" PE, let's say a Windows 7 PE
re-format the volume in this latter via format.com
Then try:
create the partition via diskpart of the windows 10 PE
re-format the volume via format.com
The CONVERT MBR is to switch from GPT to MBR (it is not about simple or dynamic) AFAICT
You could also try to put the disk offline and then put it back online via Diskpart, maybe it is *something* that remains "stciky" in the Windows 10 PE after the creation and formatting?
Or use mountvol to remove the drive letter and then re-assign it?
Wonko