Some people have mentioned problems with installing Service Pack 3 on the ISA 2004 Firewall. If you’re one of these people, you should check out this article https://blogs.technet.com/isablog/archive/2007/05/03/isa-server-2004-service-pack-3-rollback-failure-and-temporary-resolution.aspx on the ISA Server Product Team Blog.
Jim Harrison provides you a couple of options on how to get Service Pack 3 installed in the event your install failed.
HTH,
Tom
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
Email: [email protected]
MVP — Microsoft Firewalls (ISA)