I have and ISA standalone machine publishing a Web Server and Email Server(Mapi only) On occasions the w3proxy server stops responding to securenat client Get HTTP requests (the get requests are logged ok in the Webproxy logs) A stop of the w3proxy service fails from both ISA management and from Services admin. A reboot of the box with w3proxy disabled, cachedir deleted, w3proxy restarted also fails to restore the w3proxy service to functioning, and it again cant be stopped. The only method i have found to restore service is to Restore the entire machine from tape backup. Other info O/S is Win2k Server SP2, ISA Standalone SP1 Any clues