[McG]

as keratosis says...the manufacturer of your laptop should have provided an oem copy...although i know lots of them don't and i don't believe that they are specifically required to.

you could also see if anyone that you know has a disk...since you have another key you won't be using their key for validation, just your own. that should also work although keys can be notoriously tricky and you might have to tell M$ about that. i have never called M$ for that kind of thing but i have heard that you might have to do that.