This is expected behaviour. You can stop the log entries by dragging the following Comodo files into the BOClean excluder:
C:\Arquivos de programas\Comodo\Firewall\cmdagent.exe
C:\Arquivos de programas\Comodo\Firewall\cfp.exe
This should stop BOClean trying to access the firewall files and thus there should be no further such log entries.
