How to fix a problem where you can't see other computers on the network

If your XP computer can't view other computers in your workgroup, but you can ping other computers and they can ping you, you may be able to fix the problem by editing the registry. As always, be sure to back up the registry before you make changes to it. Then follow these steps:
1. Click Start | Run
2. In the Run box, type regedit to start the registry editor
3. Navigate to the following key: HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Services \ NetBt \ Parameters
4. In the right details pane, find the values named NodeType and DhcpNodeType and delete them
5. Close the registry editor and restart the computer.