For about a year I used comodo firewall with avast free anitvirus. When I installed the firewall, windows firewall was automatically turned off. I checked the security centre.
Now, about a month ago I installed avast internet security. Everything was running fine as expected. No slowdowns. That is until an hour ago. When I went to my win xp security centre I saw that win firewall is turned on and when I clicked the tab, it said that at least one firewall is turned on. And in the note it said Running more than one firewall can cause conflict between each other.
I quickly turned off win firewall. Now it says that avast internet security firewall is turned on.
I wonder how I continued to use two firewalls at the same time for a month. This is because I expected avast to turn off win firewall automatically as comodo firewall did previously. As a result I never checked it.
My question is why did avast not turn off the win firewall after it was installed? And also, now that I've been running two firewalls at the same time, do you think it has caused any harm otherwise unnoticed to my pc or avast itself?