Thanks for the link.
I have gone through the document and did find an existing setupcomplete.cmd file which I have now deleted.
Good news is it reboots at CTOS now.
Bad news is it is failing at installing Windows and I get the error; Windows cannot complete installation. Reboot and run the Windows installation again to install Windows.
I think this is usually a driver issue but the image I caputred it from was working fine.