1 Reply Latest reply on Sep 25, 2013 8:01 AM by it400c

    "This serial number is not valid for this product"

    it400c

      I just upgraded from Win7 32 bit to 64 bit (on a fresh hard drive), but when I try to reinstall Photoshop CS5 and enter my serial number, I get a message saying "This is not a valid serial number for this product"

       

      I did deactivate CS5 on the old Hard Drive.

       

      What am I doing wrong?