I just installed AIS and it looks like its firewall is enabled, but I also have win firewall enabled,
should I disable win firewall and keep Avasts??
Reboot your device and avast will auto disable win firewall
Oh I have rebooted, a couple times, I just tried again, but when I look in Win FW I see-
Home or work (Private) networks > Connected
Public networks > Not connected
Which firewall to use is up to you.
Since you paid for avast, I would say use that one and disable the Windows one.
This is not the answer the OP was looking for.
Typically, when you install a suite with firewall, this automatically will disable windows firewall.
In the situation mentioned above , something is wrong, and user should not forced to manually “disable” windows firewall
You are wrong.
Many (perhaps even most) firewall installations do not disable the Windows one when installed.
http://www.sevenforums.com/tutorials/522-windows-firewall-turn-off.html
"Hello Bmb, and welcome to Seven Forums.
Kaspersky has a firewall included in it, so when you installed it, it disabled the Windows Firewall since you should only have one firewall installed and running at one time. That is why this is red for you. Nothing to worry about since you have Kaspersky firewall installed.
Shawn "
Quoting a Kaspersky reply doesn’t relate to Avast with the Windows firewall, Avast has always been designed to run with the Windows firewall but as Eddy mentioned,you paid for Avast so you might as well use it 
“Avast has always been designed to run with the Windows firewall but as Eddy mentioned,you paid for Avast so you might as well use it”
What does it mean “Avast [firewall] has always been designed to run with the Windows firewall”
How can you have two firewalls running at the same time? Which rules would be followed? How can you, as user, manage two set of rules in such a way not to conflict each other? What would be the benefits of such approach?
Does it makes sense to you???
As I said Avast can run with the Windows firewall, if you set up the rules for Avast firewall then they are the rules thats applied, windows doesn’t apply any rules unless you activate outbound but in it’s default state outbound is disabled.
If you don’t want or understand the reason/process then disable either one but as Avast firewall is paid for then may as well use it and can either leave the Windows firewall running or turn it off, your choice
What does it mean "Avast [firewall] has always been designed to run with the Windows firewall"Avast have explained it and if i remember correct it is related to IPv6 > https://en.wikipedia.org/wiki/IPv6
To start with, which OS…!?
I have a Win 7 machine, I was poking around Avast firewall (I think it was) and found a screen where it looked like Win Firewall was being ‘managed’ (or something similar) by avast, but can’t find that screen again?
Confirmed (for the newer versions of Avast).
Asyn, where is that screen I mention located, how do I get to it??
Look in your windows settings (Control Panel under Security you should find the firewall)
Asyn, can you tell me where is that screen I mention located??
What would I notice if I had a conflict between two firewalls??
See reply #15 from Bob.
No, I mean that firewall setting for Avast, where I saw Win firewall being ‘managed’ by Avast?
how about the effects of conflict between two firewalls?