Question : Workstations cannot ping server

I restarted my server (running windows server 2003 SP2) yesterday after completing windows update; now when i try to connect to the server from any workstation it doesnt connect.  I can ping the workstations from server(ADC), but i could neither ping nor use any of the server resources from workstations.  Thinking that windows update might have blocked some services, i have uninstalled all the windows updates that are been installed for the last 2 months....
Checked IP Address & Subnet Mask
Server - 192.168.1.10 / 255.255.255.0
Client IP - 192.168.1.XX / 255.255.255.0
DHCP - disabled
Netbios over TCP/IP - enabled
Windows Firewall - Disabled
Trend Micro Officescan installed; have also tried stopping all the services of officescan but result negative.  No other antivirus software installed.
When Server is in Safe mode, workstations can able to connect server(with all services) normally.

Kindly advise with the suitable solution

Answer : Workstations cannot ping server

Problem is resolved now.
I tried again disabling all services except the windows required services, still the problem existed.
Then started uninstalling other applications installed in the server one by one.  Finally when uninstalling Wingate (Application was not running and services were also stopped disabled earlier), clients started pinging the server.
Thank you very much for the entire support team for the instant & valuable services