2014-12-11 13:26 GMT+01:00 James Sinnamon <james.sinnamon@gmail.com>:
I thought I had changed the boot order so that the first boot device is the DVD. However, it will still only boot Windows 8.1 off the hard disk drive. As I was afraid of: the secure boot!
At the moment, I am allowing Windows to boot and install, but have first disconnected the computer from the network. (If it won't install Windows off-line, then i consider that a warranty issue.)
I'm afraid I don't get the point (relationship between off-line install and warranty). However the key is disabling secure boot protection. If you google it, you'll probably find lots of information and guides to do it, likely related to your specific model (and linux distribution). My advice was just a sketch. -- Mick