My neighbor's laptop has a broken hard drive. He bought a new HD and i switch it out for him. He needs windows 7 but has no disk or key. Is there anything i can do for him at this point or does he need to go buy windows 7?
You need a windows 7 disk.
You can download it and burn it to a dvd from the website mydigitallife.info.
From there, all you need is a key and to install it.