I have have the same problem with w2k not shutting down properly. I have an Amd 450, GA-5AX M/B, and a Realtek card. I have found if I shutdown my nt4 server before my w2k box, my w2k box won't shutdown properly. If I shutdown my w2k box before I shutdown my server my w2k box shutsdown properly. I have installed the realtek driver patch from microsoft. But still have this problem. I think it has something to do with the nic driver or a link to the server, but I'm not sure.