If the parental control program K9 Web Protection (see http://www1.k9webprotection.com/) is installed on a computer with Eset Smart Security (ESS) 3.0.621 (with all of the latest program component updates) then Internet access is impossible and the computer becomes unresponsive. Either ekrn.exe uses 100% CPU or ekrn.exe and System together use 100% CPU. K9 Web Protection runs as a Service "k9filter.exe". I have added a firewall rule to allow access for k9filter.exe in both directions to any destination address and any port. Unfortunately this does not solve the problem. I think the problem may be because K9 Web Protection acts as a proxy to filter all internet access. I understand that ESS also acts as a proxy, so maybe there is a conflict between them. If I try to display the list of established network connections then that is fatal, as the computer grinds to a complete halt due to high CPU usage and the only way out is to reboot the computer. If I replace ESS with NOD32 3.0 and another firewall (e.g. Outpost Pro 4.0) then everything runs smoothly. There is no significant CPU usage and Internet access works OK. I have had to uninstall K9 Web Protection so that the computer runs smoothly again with ESS installed. I am running Windows XP Pro SP2 (fully patched). Has any one else managed to get this program to work with ESS? If so how?