Take a look here.
Installing security update MS05-019 or Windows Server 2003 Service Pack 1
may cause network connectivity between clients and servers to fail:
http://support.microsoft.com/?kbid=898060
--
Todd J Heron, MCSE
Windows Server 2003/2000/NT; CCA
----------------------------------------------------------------------------
This posting is provided "as is" with no warranties and confers no rights
"Frosty Madness" <(E-Mail Removed)> wrote in message
news:REWSe.110245$(E-Mail Removed). ..
I have Windows 2003 Server x64 SP1 set up as a file server. When there is
any SMB activity on the machine, whether initiated by the server or a
client, the networking breaks. It has a static IP, but can't ping anything,
local or not. I have latest drivers, BIOS and Windows Updates. I have to
reboot the machine to get the network back. The machine continues to
function normally in every respect except for the fact that it has no
networking.
What should I do?
Frosty.