network resource problem

I have set up a home network with 4 PC's. All are running Windows XP. Three
computers show up fine and can access and share files etc.

One PC keeps giving me the folowing errors:

"\\Dell is not accessable. You might not have permission to use this network
resource. Contact the administrator of this server to find out if you have
access permissions. The network path was not found."

I am the administrator on all the PC's. I've tried various fixes and
nothing works.

Any ideas would be appreciated.


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