I uninstalled v2.4 and did a reboot, cleaned up some of the leftover registry entries manually (wish that cleanup script was searchable on here) and then rebooted again.
Now I proceeded to install the firewall, opting to install the Basic (as I only want the firewall, no Defense+). So I get it installed, following the prompt to reboot. Reboot happens and I’m now back into Windows. There is no Comodo icon in the systray, and I’m getting both firewall alerts and Defense+ alerts. This stuck me as odd, considering I told the installer to only install the firewall.
I also verified the MD5 and it matches, so I know it’s not a bad download.
I’m sorry you have not had an answer before now on your question. We have been quite busy here and it is easy to overlook a post for quite a while before we get to it. Can you look over the posts at this link and see if any of them help you.