Bug with PXE booting pre-staged machines for deployment returns event 519

There is a bug in Windows Deployment Services (WDS) in Windows Server 2008 R2 which prevents your pre-staged computers from booting via PXE. In the Event logs on the WDS server you can find event 519 stating that there are duplicate machines with the same GUID or MAC address, even though this is not true. There is a hotfix for this problem which is available from http://support.microsoft.com/kb/2028840/en-us.

The event looks like:

Log Name: Application
Date: 2010-09-24 10:29:04
Event ID: 519
Task Category: BINLSVC
Level: Error
Keywords: Classic
User: N/A
Computer: wds1.contoso.local
Multiple machine accounts with the same GUID or MAC address were found in Active Directory Domain Services. The Windows Deployment Services server will use the first listed machine account.

MAC Address: {00000000-0000-0000-0000-00155D00C837}
GUID: {94651BB8-ED84-42C6-947A-218A66EE5A6C}

List of matching machines: CN=DEPLOYTEST1,OU=CONTOSO,DC=stenis,DC=local


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