Applying RPC vulenrability patch

You must first ensure you are running the latest service pack... Install 6a 128 bit, then run the patch, should be good after that

Microsoft Knowledge Base Article - 182514
XADM: System Attendant Fails To Start With Error 1068
The information in this article applies to:
Microsoft Exchange Server 4.0
Microsoft Exchange Server 5.0
Microsoft Exchange Server 5.5
Microsoft Exchange 2000 Server

This article was previously published under Q182514
SYMPTOMS
When you start the Microsoft Exchange System Attendant, you may receive the following error message:

Could not start the Microsoft Exchange System Attendant on computer
\\

Error 1068: The dependency service or group failed to start.
CAUSE
This behavior occurs if one of the services that the System Attendant depends on cannot be started.
WORKAROUND
On computers that are running Microsoft Windows NT 4.0, you can verify in Registry Editor that all the dependency services listed under the following key have started:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeSA\DependonService

On computers that are running Microsoft Windows 2000, to check what services another service is dependent on:
On the Start menu, point to Programs, point to Administrative Tools, and then click Services.
Right-click the service, and then click the Dependencies tab. This tab lists not only what sevices this service is dependent on, but also what services are dependent on this one.