A growing number of players have reported “Socket error-unreachable (11004)” errors when running the EverQuest II or other SOE game launchpads, and there seems to be a common cause for many of them. As discussed in this thread, antivirus software from McAfee, Avira, and the notoriously inept Norton/Symantec (who recently admitted that their software is ineffective), as well as certain Firewall software have all caused this issue.
Before you open a Support Ticket, please make sure your LAN Settings look like the screenshot below and do not have a Proxy set (jump to SOE’s official Knowledgebase article):
Also ensure that any Firewall software you have installed is allowing SOE’s launchpad get through to SOE’s update servers. Of course, if you have Malware or Viruses on your computer, they will also tend to change your Proxy settings to their own server.