What a great forum a lot of talk and no satisfied answer
That is a bit below the belt, do you kick the neighbor in the shins for trying to help start your broken lawnmower but didn't succeed?
Did you ever give it a thought that the lack of satisfaction might have come about from lack of information given with the question.
Examples of what may of helped find the cause.
What Operating system do you have?
Did you upgrade or do a fresh install of CIS?
Is your system clean?
Do you have any other possible conflicting programs?
What logs were generated by Comodo?
Did you get any Windows error event logs?
Was you using custom or default settings?
The list of possible helpful information to assist with a possible resolution can vary and much more could be added.