After 2.5 years, serial for Acrobat 9 no longer works.

I have Adobe Acrobat 9 on my computer for 2.5 years. This week, when I try to open it, it asks me a serial number, but when I enter the serial number on the disc cover, I get a message saying that the serial number is not valid. How to solve this?

After finally getting around to contact Dell, that I typed in my question, it took me just to my original question above. So evidently Dell pushes questions about Adobe products on the Adobe site.  I should add that I have installed Adobe Reader DC a few months ago so I could read more recently created PDF files. Acrobat Standard XI continued to work for a few months, but then started asking for the serial number.  Maybe not related, but it might be.  Any help on how to solve this problem would be greatly appreciated.

Tags: Acrobat

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