How to update Norton and Simantec Antivirus

Copy and paste the link below into the addressbar, for a version 9.0 or 10.0 select a) 20110816-002-i32.exe) sign means the i32 version 9 or 10.
http://www.symantec.com/business/security_response/definitions/download/detail.jsp?gid=n95 
After successfully downloaded, double click to install or update