@busthead Do you see anything when typing dir FS0: at the shell? Also, can you upload the non-working ISO somewhere and send it to me via PM?
The Windows ISOs also require you to press a key to start Setup. If XCP-ng Center is not fast enough to display the screen then you may end up with the UEFI shell. Try starting the installation from Xen Orchestra or spamming a key when the VM is starting.
hi @planedrop
could you send us the full json of the backup log ? is the disk still attached to dom0 ( in dashboard => health )
(the task will disappear after 24 hours at worste)