Re: I just want the product I purchased Adobe Acrobat Pro XI to work!!!!!!!!!!!!!!!!!! Why is that so difficult??>??!!? I paid you good money and now when I go to open a pdf it gives me a popup window that says my serial number is valid but they can't fi

You aren't talking to Adobe here. But still...Is it by any chance asking for a QUALIFYING product? If so, you purchased an UPGRADE and now need to give the serial number of the OLDER product (Acrobat 9 or X) which you must own to be able to use the upgrade. Simples.