URGENT!!!! get the same message "serial number not valid for this product" and I am RE installing on the same computer that crashed last week...

[jessicapac44]

I am attempting to RE install PSElements 11 on a computer where it WAS last week but had a hard drive crash. The message is wrong and the serial number is correct. URGENT as I am at the apple store trying to get help from apple people, and they DON'T want me to install a new version of Yosemite as it will make computer slower...

[Ned Murphy · Accepted solution]

Error "The serial number is not valid for this product" | Creative Suite

http://helpx.adobe.com/creative-suite/kb/error-serial-number-valid-product.html