Hi, I am trying to install XP Home on a Dell Inspiron laptop. I use the product key from the xp home sticker on the underside of the laptop. And, I get invalid key every time I try. The XP home CD is not the one one that came with the laptop but it's a valid key sticker and i thought it should work. Why isn't the XP home key working with an XP home disk? Thanks, Lee G.