Reading the posts of fellow Guru-members, it´s ok, not to take the message seriously.
Only to the fact that it´s Symantec?
Symantec analyzed data in a discovered botnet. They stumbled upon the account information. It´s not about virus detection software, like norton 360 etc..
Be glad they found the information, that it is made public.
If Symantec discovered 2 million accounts possible to be hacked in the future, it's in my opinion Arenanet/Ncsoft who should be talking with Symantec to investigate whether or not the owners of the 2 million accounts should have an in game message/mail stating that they should change their passwords immediately. This will also give them conclusion to check the computer for malicious software.
Don't shoot the messenger, but the content....
EDIT:
It could be originated by the hacks of several gaming fora using outdated unsecure software, like wordpress, vbulletin etc
Trojan.Loginck
Risk Level 1: Very Low
Discovered: May 20, 2010
Updated: May 20, 2010 1:36:08 PM
Type: Trojan
Systems Affected: Windows 98, Windows 95, Windows XP, Windows Me, Windows Vista, Windows NT, Windows Server 2003, Windows 2000
Trojan.Loginck is a Trojan horse that logs on to gaming websites to check if stolen gaming credentials are valid.
Deatil: This Trojan can arrive on a computer through a variety of methods. As a result the file name of the Trojan will vary from one situation to another.
When the Trojan is executed, it contacts a predetermined server and downloads a list of stored user names and passwords for gaming websites.
Note: The Trojan does not steal these account details. They have likely been gathered by other information-stealing threats.
The Trojan then attempts to log into these gaming websites in order to determine if the account is valid.
Spyware website:
Trojan.Loginck Description
Trojan.Loginck is a dangerous Trojan infection. Trojan.Loginck will corrupt a computer system in a variety of ways, either by a spam email messages, malicious websites or file-sharing networks. The file name of the Trojan may differ from one situation to another. If Trojan.Loginck is executed on the computer system, it will contact a remote server and download a list of stored passwords for online gaming websites. The Trojan infection does not steal these account details. They have likely been collected by other information-stealing threats. The Trojan then will use the infected computer for trying to log into these gaming websites for checking if the account is valid. It is very important that a Trojan such as Trojan.Loginck is automatically detected and safely removed with a spyware removal tool.
Removal instruction:
To remove Trojan.Loginck, you must first stop any Trojan.Loginck processes that are running in your computer's memory. To stop all Trojan.Loginck processes, press CTRL+ALT+DELETE to open the Windows Task Manager. Click on the "Processes" tab, search for Trojan.Loginck, then right-click it and select "End Process" key.
To delete Trojan.Loginck registry keys, open the Windows Registry Editor by clicking on the Windows "Start" button and selecting "Run." Type "regedit" into the box and click "OK." Once the Registry Editor is open, search for the registry key "HKEY_LOCAL_MACHINE\Software\Trojan.Loginck." Right-click this registry key and select "Delete."
Finally, to completely get rid of Trojan.Loginck, you must manually remove other Trojan.Loginck files. These Trojan.Loginck files can be in the form of EXE, DLL, LSP, TOOLBAR, BROWSER HIJACK, and/or BROWSER PLUGIN. For example, Trojan.Loginck might create a file like
%PROGRAM_FILES%\Trojan.Loginck\Trojan.Loginck.exe. Locate and remove these files.