here is the correct file for HERO VIII it's under windows 7 64 bithttp://dlcdnet.asus.com/pub/ASUS/mb/LGA1151/MAXIMUS_VIII_HERO/MAXIMUS-VIII-HERO-ASUS-3703.zip
I have download the MediaCreationTool and the latest version is 15063.0...then i create a bootable usb through the tool and that's all....there is not Greek as Languages look at the Notes......