only checks incoming not outgoing that is correct
ZA offer outbound protection that Win Firewall does not. I have been using ZA Pro for a long
time now and the only incompatibility issue is with ZA's Privacy settings IE. Cookie Control, Mobile Code and
Ad blocking. This is a ZA problem not Avast the people of ZA have been made aware of this problem
however have done little to nil in rectifying the problem. with these setting disabled ZA works very well.
There are many other freeware programs that can deal with Cookies Mobile code and Ad Blocking.
The latest version of ZA is 6.0.631.003
Installing another program is up to you my friend ZA offers just that bit more security , protection detection