Whenever Win 10 VM is started, it first drops to UEFI shell, requiring manual intervention.
Immediately after the VM boot-up, black screen with text "Press any(?) key to...??" (currently it's hooked to low-res TV, and the margins are cut off, so can't read the text completely).
No matter what you do there, you still end here:
UEFI Interactive Shell v2.1
UEFI v2.50 (EDK II, 0x00010000)
FS0: Alias(s): CD7a1....