I have a question. Currently, I'm using Windows 7 SP1 (64-bit) on my Dell Inspiron M5040 8GB RAM, but I am thinking about upgrading my hard drive. Currently, it's 500GB, but I want a 1TB hard drive. I spoke to a Microsoft tech about this matter, and he told me that because my machine came with pre-installed Windows 7 Home Premium in it, that if I were to upgrade my hard drive, that I would need an OEM Windows 7 Home Premium disc, so that I would be able to use my current product key. Because if it was not an OEM disc, that my product key would not work. So my question is that really true that I in fact need an OEM Windows 7 disc because my computer came with Windows 7 pre-installed, or would a recovery disc (I've seen them on eBay) do the job and install with my Product Key? I would really appreciate anyone's help with my matter.