Hi there! I just bought a Dell Optiplex on which I'd like to do a fresh install of the included OS. I have no media, no restore partition, just the sticker which says: I can't find any meaningful information about the mysterious "OA" edition or the X16-96076 ISO. Do you know what they are? Anyway can I download a Windows 7 Pro ISO and then use this product key. Does the 32 or 64-bit edition matter? Do I need to download a specific language? Thank you!