The System event log on your Windows 2000 server contains:
Event ID: 4097
Description: The COM+ Event System detected a bad return code during its internal processing. HRESULT was 800706BA from line 42 of .\eventsystemobj.cpp. Please contact Microsoft Product Support Services to report this error.
When your clients attempt to connect, they may receive a message that is similar to:
The remote server is unavailable.
To workaround this issue, install the MS03-026: Buffer overrun in RPC may allow code execution security update.