I don't know what changed, but 2 out of 4 boxes on the network are XP and their Network neighborhood is stopped working correctly about a week ago. When one clicks on any folder in NN (network neighborhood), NN will just hang, until i end it through the task manager, then I have to restart explorer and when I access NN the second, it usually lets me access whatever folder I want. I can ping all computers just fine by hostname and the 98 machines have no problems even accessing files on the xp machines via NN. Anybody tell me what ports XP uses to talk to a local network? The only thing I noticed is that when the comp first boots, the default action for clicking on an NN folder is "Open", but after I end the hung NN through task manager and restart explorer the default action when clicked is "Explore" and thats when it works. But if I right-click on the folder and select "Explore" before restarting explorer, it give the hour-glass for a few seconds and then does nothing. If i select "Open" then NN hangs and I have to end it. Any ideas, suggestions, troubleshooting tips would be greatly appreciated!