Hi All I am trying to upgrade an ISA 2000 (Standard) to ISA 2004 (Standard) the upgrade / Setup process goes fine until the screeN reads it is installing filters at that time the installation failes and backes out of the install. I have tried; 1. removing the ISA 2000 and doing a fresh install 2. upgrading a default isa 2000 install 3. shutting down all processes excluding the basics needed to run The server is a 2003 Server, it is a domain controller and runs DNS, DHCP, Terminal Services and a mail server. Although this configuration is not the optimal, it has worked very well under isa 2000. I have had to remain with 2000 as the upgrade continues to fail. Any help with this issue would be appreciated. Peter