The Pros and Cons of X16 96076 Iso Rapidshare for Windows 7 Users

The sticker at the back of my notebook shows that the.iso copy of myOS is X16-96076. Such.iso is not available on Digital River. My questions are:1. Which.iso copy should I download to successfully reinstal my OS? I have got serial number of my OS but I do not know if it fits to other.iso copy. There are f.e.- Windows 7 Professional SP1-U ISO English x64: X17-59186.iso- Windows 7 Professional N SP1-U ISO English x64: X17-59337.iso2. What do the enigmatic numbers mean like: X16, X15, X17?3.

X16 96076 Iso Rapidshare