Kindly double check the serial number you’re entering. Ifyou’re sure that you’re entering the correct serial number but you’re stillreceiving an incorrect serial number message, it means that the installer you’reusing is incorrect.
Upon checking here on our end, your subscription is from Best Buy. You haveto download the installer that is for Best Buy subscribers. You may downloadthe installer from this article:
If you encounter any issues regarding the installation ofyour Antivirus for MAC, you may post again on our community or you may alsocontact the GeekSquad, the support of Best Buy. Here is their phone supporthotline: 1 800 433 5778