Hey, it's so that i got good experience in about firewalls and protections and so on for Windows computers ...
and here is the result: Eset Smart Security dosen't protect that well, it's not working enough thats why it's not slowing down yours computer like other softwares.
I would recommend Avira Internet Security & Avast Internet Security... if i had enough money and was rich i was going to use Avast Internet Security because it's great it can scan the computer before you login to windows it got also good protection the same as Avira.
I wouldn't go to Webroot Complete because it's not that famous and not enough tests so nobody knows if it's protecting you enough, maybe it only detects those test viruses and false virus but not the REAL heavy viruses.
so if i was you i would go to Avira Internet Security or Avast Internet Security.
NOTE NOTE: If you are looking for a great free internet Security with Firewall and Antivirus and more, you can check out COMODO Internet Security there are a free version of Internet Security and a paid version of Internet Security called COMODO Internet Security Complete and COMODO Internet Security Plus