Hi Guys I hope you can help me with this one because I dont know what else to do and am under serious pressure to produce results. I have a win2k svr - sp4 running exchange 5.5 also sp4. The problem has three main symptoms: 1) after some time of operation if I go to the event viewer, double click on one of the events nothing happens. I can try this for other logs e.g system + app log but nothing happens. When I then try and close the event viewer I get a message that I cant close the program before I close all the open property pages. But there are no pages open. 2) We are on a dial on demand connection. When I double click the dial up status icon on the task bar it doesnt respond. Also when I double click the dial up short cut on my desktop it doesnt respond either. My connection becomes "stale" and I have no traffic coming in or going out. I cant also at this time access the network and dial up connections option. 3) The clients lose their network connection to the server. Eventually I have to restart and everything goes back to normal for a while until this starts again. I have consultants in today who condemned my DNS and WINS. They went ahead and rebuilt these but hours after they left the same thing occurred. I am now in the process of getting the latest OS patches via the windows update site. I dont know if this will help however. Can anyone assist??? Naboth