7100RC Windows firewall does not block echo request. ("Block ICMP from any IP to any IP where ICMP Message is echorequest") I could not figure out how to add this - it used to be a simple checkbox. So I put up Comodo. Which used to automatically shutdown Win firewall, and then Action Center would recognize Comodo. No more. So I installed Comodo, rebooted, and manually stopped Win Firewall. Comodo is operating effectively - full stealth from gibson research scan. List of MS approved is at http://www.microsoft.com/windows/antivirus-partners/windows-7.aspx Kris