On my network, Only windows xp machine cannot brower the internet other all function are working. i have check the Networking connection. Dns , Dhcp, Proxy Server all other working fine. Even Windows 7 Machine are working fine. Suddenly yestersday 3:00pm, Browering was very slow and Now its not working. I have reboot the switch, Connection test to other network change the port. But still the same. I think only windows xp mahine have this issue. I have remove the network cable and But my Laptop on the same port its working becasue my laptop is windows 7. If one machine can understand, But all of sudden 10-15 machine have same problem.