VERY IMPORTANT - MAKE AN EFFECTIVE STANDALONE UNINSTALLER DOWNLOADABLE
In my case there is no Comodo Firewall entry is left in the "Add or Remove programs" list. I have learnt from the forums discussions that others had the same problem. Sometimes the uninstaller disappears completely or the remove button disapears.
So, like many other programs, please create a really effective uninstaller that completely uninstalls.
In my case it is not that I want to get rid of Comodo, but I have to unistall and reinstall to delete it because Comodo keeps blocking an important program although I have given it trusted status through "Define trusted application" and this is confirmed in the "Computer Security Policy" list.
And many people have great difficulties with uninstalling Comodo Firewall. This is giving Comodo a really bad reputation on the Internet and many are warning for using Comodo. This must be high priority.
PS. Pandolouk posted a standalone uninstall in the FAQ forum, as an attachment, but this attachment is no more availble.
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http://forums.comodo.com/frequently_asked_questions_faq_for_comodo_firewall/manual_uninstall_of_cfp_2x-t5326.0.html;msg39350#msg39350)