If Best Buy has used a HP restore DVD, it would be self activating. Assuming that is not the deal, then perhaps a HP Recovery Media could be obtained, but that also require a model number for the PC. If everything is good except for the product nagging about needing to be activated, and M$ says the install is genuine, you have some choices. The most ideal would not to reinstall but just get it activated. Please post a screen shot of the "System" page that shows just what is what. You can get to that by right clicking on the "Computer" icon and then pick "properties". If you do not have the "Computer" icon on the desktop, click on the "Start Button" in the lower left corner then right click on the "Computer" in the listing on the right side of the popup.