Avast Premier Preventing Computers from Networking

I have two computers that I use. One pulls files and programs off of the other through our network.

Last week, it stopped working. I tried everything and found out that when the firewall is off on Avast it works fine! When I try to reinstate the firewall, it can’t connect anymore.

I can’t run my computers without a firewall!

Anyone have any ideas on how to fix this?

What Operating system ???
Windows 7 and up has an excellent firewall. :slight_smile: