Until that update of Kerio a week or so ago, I had no problems with the firewall. I was perfectly happy with it. Of all the firewalls, I think ZA is the easiest to use. Everything is self explanatory. No need to spend hours reading faq sheets and other bull with ZA. My problem was with its use of resources, it took forever to load when the computer was rebooted. Kerio, took a little more time to get used to the way it went about doing things, many trips to its website and reading over faq sheets. I finally worked it all out. Comodo on the other hand is confusing, I "did" read the faq sheets and read over the website before installing. Didn't explain itself very well. After many hours searching on its website I discover it has a pre-approved list of programs Comodo has determined is safe for access to internet. I'm a little confused IE was pre-approved but Outlook Express isn't. I also don't like the way you have to open Comodo. When it opens, you have to go to a Comodo Launch Pad, the hit another button to open the interface where you can check setting or do anything else you might need to do. Annoying. My 2 cents for what it's worth.