I have Windows XP Professional SP2 installed. The problem is, whenever I want to move or copy or delete a file(s) by pressing Ctrl+X or Ctrl+C or Del key or by right-clicking on it, my Explorer hangs. I can see that drwtsn32.exe starts in the background and after a few minutes I see a message "DrWatson Postmortem Debugger has encountered a problem and needs to be closed" and my Explorer also crashes. I can only move or delete files using DOS command prompt. Any help to solve this problem will be greatly appreciated. By the way, I have Norton AntiVirus 2004 Professional with latest update and ZoneAlarm Pro installed in my PC. I also tried "sfc /scannow" in vain.