Good antiviral and tips with Zonealarm

Good morning people, I'd like to ask you two suggestions.
First and foremost: I had to defenestrate Norton Internet Security, and installed in its firewall stead Zone alarm. It works well, but on this very site and other sites it block any animated gif to work. For example this emoticon:
was once animated, now it's static. Ans I stress ALL the animated gifs aren't so anymore. Is there a way to work around this?
And for last: do any of you know of a good antiviral to install that can live with Zone Alarm. I tried Avast, but it pretty much froze my PC. Had to enter in safe mode and uninstall it before I could use the PC again and for a moment the specter of a OS re-installation has gloomed over me. Never again. BTW, no Norton, please.
Let me know, please.
First and foremost: I had to defenestrate Norton Internet Security, and installed in its firewall stead Zone alarm. It works well, but on this very site and other sites it block any animated gif to work. For example this emoticon:

And for last: do any of you know of a good antiviral to install that can live with Zone Alarm. I tried Avast, but it pretty much froze my PC. Had to enter in safe mode and uninstall it before I could use the PC again and for a moment the specter of a OS re-installation has gloomed over me. Never again. BTW, no Norton, please.
Let me know, please.