Adobe Acrobat 9 Pro CD Disk Will Not Re-Install
Apparently an all-too-common story. On October 29, 2012 I purchased a retail copy of Adobe Acrobat 9 Pro from an eBay seller. AFAIK it was a legitimate copy--sealed box, brand new factory installation disk, two rectangular stickers side-by-side on the plastic wrap:

The CD disk is dated 4/08. I believe the second disk (3D Capture Utility) also came in the box (I didn't save the box).
I installed Acrobat on my Dell Dimension XPS desktop and it ran fine--initially accepted the serial number and ran subsequently with no warnings from Adobe--for a year or two. But then my Windows XP Pro got corrupted somehow (unrelated issue) and I had to re-install Windows. So naturally all my software installations were lost. Everything went back on but, of course, NOT Adobe Acrobat 9 Pro. No; instead I got the "serial number invalid" message.
Well after that, I switched to Foxit Phantom (which we were using at work). But now, I want to try to re-install Acrobat, which I prefer and I paid good money for.
But Adobe customer support is of no help. People there following various scripted guidelines tell me I need to contact eBay for help, and that it is Adobe policy not to support products purchased on eBay. Ridiculous. Perfectly legitimate software products are sold on eBay. No, that is just a cop-out for lazy customer service. If the Acrobat CD was bad to begin with, which I doubt, it should have been identified during installation or subsequently via the Internet connection as I ran it. But I think it was always a legitimate copy (that unfortunately could not be properly uninstalled and now cannot be re-installed). Naturally Adobe wants me to purchase a new product (at considerable expense). Not going to happen.
Questions:
1. Is there any reasonable solution to this, apparently common, problem? (Yes, I have and will continue to read other Internet forum entries.)
2. Can I check the CD to see if the serial number on the tags is the correct one? (Probably impossible.)
3. How can you determine if an Adobe CD is genuine (other than by being told by Big Brother Adobe that it is or isn't)?
Thanks for any help.
Tim
