I have a laptop (Acer 3010 ; OS is XP) that shares a broadband wirelessly with my desktop PC (Vista) and before that with an Me desktop. Boot-up on the laptop is delayed briefly by a “System error” message that says, “ A duplicate name exists on the network”. This has happened for a long time - perhaps began when I got the Vista machine a couple of years ago. I simply close the error message window. How can I cure this problem/stop the message appearing?