Netlogon took more than %1 seconds for an authentication request of account %2 in domain %3, through domain controller %4 ...

Netlogon took more than %1 seconds for an authentication request of account %2 in domain %3, through 
domain controller %4 in domain %5. This is the first warning. If the problem persists, a recurring event will be logged 
every %6 minutes.
Please see http://support.microsoft.com/kb/2654097 for more information on this error.