I purchased Creative Suite 5 Design Standard (Upgrade) 4 years ago and get two copies for my PC and Mac. Recently Acrobat Pro crashed and I uninstall it from my PC (Windows 7). When I installed only Acrobat Pro from disk get with ACS5, the program asks for the serial number. I went on the AdobeID site, checked my account, and got the serial number for my Adobe Creative Suite and Acrobat Pro. But when I enter that serial number, I am told that it is invalid. I've triple checked, and the number is correctly typed.
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