Windows 10 1511 Update, Mac Pro

Hi all,

Ive started the Windows 10 update, once it passes the first install procedure and restarts I am welcomed to the screen being black with only the logo present. This has not changed or done anything else for the past hour. Can anyone help with this?

*Extra information. On installing Windows 10 for the first time, I had to removed all hard drives apart from the Windows drive, would this be an option for now too?

Thanks.