Can someone define this error for me please?

Aside from the expalantion given on the page for the link given below i'm still not clear since we are not experiencing network problems, no changes have been made to the firewall recently and the network interface is fine as suggested.

Event Type: Error

Event Source: NetBT

Event Category: None

Event ID: 4321

Date:

Time:

User:

Computer: x

Description:

The name "%d" could not be registered on the Interface with IP address xx.xxx.x.xx. The machine with the IP address xxx.xxx.x.x did not allow the name to be claimed by this machine.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Thanks in advance...