For a temporary solution: I recommend you open up Task Manager (press Ctrl-Alt-Del assuming you are running Windows XP) then kill the EZ Armor processes one by one. These include Isafe.exe, Vetmsg.exe, CAVTray.exe, CAVRID.exe, and ca.exe. I think ca.exe is the only one that affects the firewall, but if your license has expired then I don't think there is harm in killing the antivirus stuff (although soon you should consider installing some antivirus software for safety's sake.)
For a long-term solution: you should go to Add/Remove Programs in the control panel and make sure you have truly uninstalled eTrust EZ firewall.
I am basing these suggestions on information I found
here. If anyone has actually used these programs they can probably be more helpful. However, I think that perhaps no one else here has, so I figured it might not hurt to offer some ideas.