Well, in total we have 3 different models of computers with Windows 10, Fujitsu, HP and Bluechip.
Bluechip and Fujitsu can be captured meanwhile without problems.
Reinstalled the HP with the default partition layout that comes with windows 10. There are 2 partitions. One with 549MB, system reserved, the other one is for C:.
EFI is disabled.
During boot I see this error-message. Dunno whether it is relevant:
[Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x22 (or later)
Capture still fails with (sorry for the bad quality):
Your suggested debug steps are still not working, since fixparts is obviously not in the image.