thanks again for your supportTwo reasons that I can think of why you may get such a message, the ISO is no good and the drive where the ISO is has not been selected, I don`t use a VM regular so not the best placed to advise you I`m afraid.
Got a link to from where you made the purchase.
I don't want to trouble you any further
I'll keep trying as possible and will let you know if I have any success
Best regards