Error 403-Forbidden means that you do not have permission to access a specific page or directory.
You should go in Zone Alarm's settings and allow your browser to connect. You can read how to do that here:
http://www.markusjansson.net/eza.html
If you still can't access links try to configure McAfee to allow your browser to connect to the internet:
http://store.bioware.com/help/mcafee_firewall.html