unistall/reinstall help

Help please. recently installed comodo firewall 2.4. had problems with computer which resulted in me uninstalling comodo firewall. this was a decision quickly regretted, when i attempt to reinstall i get a dialog box come up and advise comodo already installed. i have option of the either uninstalling or leaving, when i attempt uninstall nothing happens and if i leave it alone i can’t find it anywhere. can someone please help?

Hi and welcome to the forum.

You could try the uninstaller here: https://forums.comodo.com/index.php/topic,5326.0.html