I'm using AIS with the firewall temporarily removed (bugs) + CIS atm. No problem, but just don't use two firewalls at the same time: if you want to keep Comodo FW, uninstall the firewall component of AIS. Don't just deactivate it, remove it (or disable the Avast FW service, could work too). You could get into serious troubles otherwise. AIS firewall keeps watching the network even when not active, ie just stopped from the UI. I've experienced that >>> Windows freezing at login time.