Installing used win7 key

I will be getting a new laptop soon (with Vista, ugh) and I want to install Win 7.
But the RC seems to be closed so I can't get a new key, so I was wondering if it would be possible to use the key form my current laptop after I've formated this computer (and then maybe throw it away, piece of junk), or would it not work?
it probably won't work since you register the pc after installing if I remember correctly.

Or is there any other way to get a new key?

EDIT: Never mind, It was only the RC download that was closed, getting new keys is still possible.

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