I was using Private Firewall and avast free until the new beta (v2014 beta) was released.
PFW didn’t play well with the new beta. Uninstalled PFW then installed Comodo Firewall v5.12. So far so good.

For Comodo Firewall v5.12 http://filehippo.com/de/download_comodo/13662/
To install CFW see http://www.knightwithapc.com/2011/11/download-comodo-firewall/ :slight_smile: