First off, I'd like to first point out that whether or not you have a valid license key, the act of downloading a copy of Vista from the Internet is still considered illegal in most countries as the software itself is copyrighted and you would be obtaining it through illegal means and be making an unauthorized copy. The key you have would only most likely work with an OEM copy of Vista supplied by your laptop's manufacturer, in which case you would have to contact them to get a copy of the CD/DVD. If they refuse and you decide to go out and buy a retail copy, you may need to obtain drivers for your laptop, which in some cases, can be quite a pain.