Comodo Firewall cannot "Stop All Traffic" without...

… hang up the whole CIS application interface. Must shut down/restart to gain access again.

I read it again, but… didnt help

…again?

Make sure there are no left overs of previously installed security program around. Try using removal tools for those programs. Here is a list of removal tools for common av programs: ESET Knowledgebase .

If you have other security program(s) running in the background see if disabling them makes the problem go away.

Thank you very much!