Cannot successfully update W2003 Server with SP1

I have been trying to update a Windows 2003 server with SP1 using Windows
Update and also by running the executalbe after download. It fails each time.

I receive the following messages in the event viewer.

Application log
The COM+ Event System attempted to fire the
EventObjectChange::ChangedSubscription event but received a bad return code.
HRESULT was 80040201.
The COM+ Event System failed to create an instance of the subscriber
{D3938AB0-5B9D-11D1-8DD2-00AA004ABD5E}. StandardCreateInstance returned
HRESULT 80070422.


I also get this error message when trying to open Component Services:

Unable to start application because (DacCom) is not installed properly.
Please reinstall this product.

System Log
DCOM got error "The service cannot be started, either because it is disabled
or because it has no enabled devices associated with it. " attempting to
start the service SENS with arguments "" in order to run the server:
{D3938AB0-5B9D-11D1-8DD2-00AA004ABD5E}

I also could not successfully register the following dlls manually:
sccbase.dll & slbcsp.dll

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DLove