I am using Windows 2003 server and it is a Domain controler. I was running great and was also getting accessed from other DC and clients. But after installing Mcafee Enterprise 8i and restarted, the server was disconnected from the network and was not able to access from other DC or clients.

when i ping the gateway, it shows "Destination host un reachable"

Please help me, the server is on halt, and there is a bulk of data to share with users inside.