Question : can't access sbs2003 network resources

I have been  running sbs2003 server without to many isues for a while, today I lost communication, I can't access the network drive, I can't ping the server.  I'm able to ping other devices on the network.  I removed all the patches that were installed today, 979909, 983583, 976765, 980773, 963090, 976769v2.  Then rebooted, no effect.  Does anyone have any ideas on what would just inturupr communications?

Answer : can't access sbs2003 network resources

OK. lets go right back to basics.
1. please confirm IP address is set on NIC and server can ping itself
2. please confirm windows firewall is disabled
3. I think the DHCP error is a red herring - ignore it for now
4. Network cards do fail. Does the server have another NIC in it already that you can make active? if not can you buy one?   - make sure you take the IP settings off the old NIC first
5. have you swapped the LAN cable and plugged into new port on the switch?

That will do for now