If the retail version of Symantec AntiVirus 2005 gives you an error LU9002 you will need to re-sync with the Symantec server. In my case, Norton was showing a subscription expiration date of 12/31/1899 (not a typo) and Live Update was complaining that it had expired, so it wouldn't download any definition updates. It wasn'tContinue reading “Symantec LU9002”