Netlogon has failed an authentication request of account %1 in domain %2. The request timed out before it could be sent to ...

Netlogon has failed an authentication request of account %1 in domain %2. The request timed out before it 
could be sent to domain controller %3 in domain %4. This is the first failure. If the problem continues, 
consolidated events will be logged about every %5 minutes.
Please see http://support.microsoft.com/kb/2654097 for more information.