Sorry to hijack the post but it is kind of on topic. Is there a way to do clean format install if you not got a blank DVD or USB from ISO?.
I might be out of my comfort zone here, but IMO you need a DVD or USB I'd go for the DVD TBH, the ISO needs extracting to usable files to be able to boot & activate your HD (Not sure though)
there is a cost of £16.58 to pay, which I don't mind, rather than taking pot luck with downloads.

