If you have received a message similar to the ones displayed below when trying to install your product, stating the serial number you are using is invalid, or has been revoked, it is because the serial number you are attempting to use has been blocked by Adobe.
Adobe blocks serial numbers that are known to have not been issued by Adobe, or are known to have been used fraudulently by unauthorized sellers to produce counterfeit software. Unfortunately, you may only know the serial number has been blocked for this reason when re-activating or reinstalling Adobe software.
Check that you are using the correct serial number for your product installation. See Find your serial number.
A serial number has only 24 numbers. Here is an example of the serial number format: 8721-0892-0867-4459-9223-2874.