I've just started to get a security alert telling me that the virus signature database is out of date but when I click on update it says that there is no new updates are available and I have the latest version 12591 (20151119) that was updated on 30/01/2016 at 1:00:09 PM. I can see on the update page that there been a lot of updates since then but ESET Smart Security can't or won't detect them.