Thanks for that. I will have to look a bit further into this. Yes hivernation must be hibernation, this box is speaking french even at boot!
The windows partitions don't mount, aren't even accessible , at boot (I used Puppy, that looks for save files in the hard drives and it couldn't) but they were accessible once the system was running.
Having little experience of changing discs on this sort of system, what do I need to do when I swap the old disc for a new one (the whole hard drive, not repartitioning)? Will it just be found once it has been formatted (like the last ones i have replaced)? I would prefer to start with a clean disc!
Does the dual boot mention simply mean that it supports MBR and UEFI?