Authz Logon Failures with no User Name, Domain Name, Source Network Address or Source Port

Hi there,
Across our network I seem to be getting numerous of these errors - I have pasted details below:

Logon Failure:
       Reason:            Account locked out
       User Name:      
       Domain:      
       Logon Type:      3
       Logon Process:      Authz  
       Authentication Package:      Kerberos
       Workstation Name:      ABC23S003
       Caller User Name:      ABC23S003$
       Caller Domain:      CS
       Caller Logon ID:      (0x0,0x3E7)
       Caller Process ID: 1068
       Transited Services: -
       Source Network Address:      -
       Source Port:      -

I have looked at the PID relating to this which is svchost and hence encompasses multiple services eg audio service, browser, etc etc all of which are running just fine, and can (and have been) stopped and started.
The information above was pasted from a DC called abc23s003 - hence it is reporting this error into it's own logs, I do however have exactly the same errors appearing on multiple Member servers also.

The above event is preceded by the following:

Service Ticket Request:
       User Name:            ABC23S003$@CS.GCG.NET
       User Domain:            CS.GCG.NET
       Service Name:            host/abc23s003.cs.gcg.net
       Service ID:            -
       Ticket Options:            0x40810000
       Ticket Encryption Type:      -
       Client Address:            127.0.0.1
       Failure Code:            0x12
       Logon GUID:            -
       Transited Services:      -

I have googled about but have come up with no solutions.
Any suggestions?