firewall blocke by program

When I start up with windows 7 I get a message that the firewall is blocked by a program. I should stop the program.
If I do so, Comodo firewall works well. How I can find out where the problem is e.g. what kind of program stops the firewall?

Check the windows event logs, there may be some info in there. Type “eventvwr.exe” in the “Search Programs and Files”