Loving WIn10 on my Dell 5558 as much as I do, I thought I'd pull my old Dell D830 out and get it installed on it. It came with Vista on it but when I got it, it had Win 7 Pro. I upgraded it to Win10 for a while but then I went through a Linux period where I thought it was the bomb. Linux was installed on the D830 when I pulled it out of the closet. I got W10 installed without any difficulty, however, I do not have the documentation for Win7 so I don't have the product key. Is here a way of getting this old machine reactivated or did I blow when I installed Linux?