Thanks for your suggestions.
The uninstaller does not work for me either - nothing appears… so I deleted all CIS related files and registry entries I could find and installed in safe mode.
Unfortunately the result is the same and the program remains unusable for me. Anyone have any ideas?
Thanks
Check Using Comodo System Cleaner To Clear The Left Out Entries, If There Is Any And Then Try To Install CIS Back And Check
Follow this tutorial on complete uninstalling Comodo: https://forums.comodo.com/help_for_v3/comprehensive_instructions_for_completely_removing_comodo_firewall_pro_3_info-t17220.0.html .