Hi David;
Yes... ZA has lots of program listed -- some, like Avast!, are always allowed internet access, a few are denied, and most I have set to prompt me so I can decide whether to grant or not.
I removed all of the entries and re-booted the box.
ZA prompted for various apps and I granted Avast! access. However, once the box was fully booted Avast! would not respond.
Once I stopped ZA, Avast! came to life. I was able to re-start ZA and my machine is happy -- and all is well for now.
I am at a loss as to why ZA blocks Avast! and how to correct the issue.