I have one (new) computer running WinXP SP2 accessing the internet via a router to cable. The router also serves other computers running Win2000 and Win98. Each time the WinXP computer starts I get a window called "Message" with this text "There has been a network error. The update document is not available".

Despite following every bit of advice I have received I cannot get the WinXP computer to see the others. Trying to map a drive from one of the others will usually work once but when the computer is restarted the mapping fails.

Can anyone suggest what is happening, please?