Norton Error 8504 is usually associated with the failures that can occur in the installation, when any other anti-virus has been previously installed in the system or when the Norton software asks for an update and fails in that process. The error is shown in four ways, and they are Norton Error 8504 0, Norton error 8504 5, Norton error 8505 and 104, and lastly Norton Error 8504 and 100. These are basically error codes which are displayed in the combination of alphabets ... Read more