SYMPTOMS
If an application opens the event log file, and then someone tries to clear
the event log, either interactively or by using an application, while the
application still has the event log file open, Services.exe may quit with
an access violation.
After Services.exe quits, RPC will no longer be available. After this
occurs, %SystemRoot%\Drwtsn32.log will be created or updated. Often, NET
USE sessions provided by the server remain active and new sessions can be
established. The following messages may be returned to client requests
involving the RPC services:
Error 1723: The RPC server is too busy to complete this operation.
-or-
Error 1722: The RPC server is unavailable.
-or-
Error 1721: Not enough resources are available to complete this
operation.