in computer A do net view \\pcbname? what do you receive? if it is system error 5, this is permission issue. for more information,

system errors System error 5 - Access is denied. This is a permission issue. If the net view command fails with a "System error 5 has occurred. Access is denied. ...
     www.chicagotech.net/systemerrors.htm

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.
 I have several computers networked togather in my house. These are connected
 through a router. Here is my problem.

 Both of the computers i am trying to get to "talk" to each other are running
 XP pro. Computer A is a Dell desktop and Computer B is a Sony laptop. Both of
 them want me to enter a username and password to connect. Computer B i have
 got to "talk" to Computer A by entering a username and password (that are the
 same on both computers). The problem comes when trying to get Computer A to
 "talk" to Computer B, they dont. When trying to get Computer A to connect to
 B i get the Connect to... box. The username box is Grayed out with the user
 "Guest" and no matter what i do i cannot connect.

 Computer B has the guest account disabled and when i do enable it to try and
 connect A to B i get a Access is Denied, you do not have the rights, contact
 the system administrator. How can i get Computer A to connect to Computer
 B????