Looking through the older messages I noticed that some have trouble uninstalling Comodo Firewall and that gives me pause. Is it true that it can be difficult to get rid of Comodo if one decides not to use it?
It is true for some users, at least a handful. However, this is the case with almost all software. Comodo claims that the uninstaller of CIS is sufficient. If it fails, it's a matter of other circumstances.
CIS gets uninstalled by about 4% of the 15 million who tried it, and as far as I can tell, I haven't seen 600,000 users requesting help. This forum hardly has 60,000 members.

If you decide to uninstall, and the uninstaller somehow fails, the forum is here to help you.

LA