DNS Client

I am using Windows XP Home Edition. Ever since the transition of Excite@Home to AT & T, I’ve had problems with getting intermittent “Cannot Display Page” errors in IE. Whenever I went into Netowrk Connections and just opened up “Advanced” on the TCP/IP, then closed, my problem went away. AT & T has been no help in solving this. I finally went into msconfig and unchecked DNS Client. So far, since then, not one problem. Any clues from anyone?