I am running an Internet Cafe of 20 PC's and I've a BT Broad Band Connection with D-Link ADSL Router. Every thing is working fine but one of my WinXP Professional PC not getting an IP Address Automatically from my ADSL Router as it has a built in DHCP Service. Also when I open Internet exploror it closes as soon as its open. When I specify an IP address manually and set the Router's IP Address as a gateway it starts pinging the IP address of the website but we cannot ping the host name like www.yahoo.com, but the explorer things remain same. I remove MCafee Antivirus from my computer but the problem remains same. Kindly Suggest.