I'm sorry. I researched firewalls which many reviews ame to the conclusion that this was the best free firewalls available. But the nagging pop up window letting me know that Comodo was l'earning' or doing some thing I didn't understand drove me absolutely crazy. It seemed like every keystroke I made, a Comodo window would pop-up, which also took up processing time. Sorry. Maybe I did something wrong. Anyway, I went back to Zone Alarm.