DCOM 10021 -- DR.WEB issue
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When a Windows 2003 server running DR.WEB is upgraded to Windows 2003 Service Pack 1 (SP1), a DCOM error with the Event ID 10021 may be present in the event log. The description contains a reference to the CLSID .
A 10021 DCOM error associated with access control restrictions can also be generated.
What to do
Select Start|Run and type
dcomcnfg
In 'Component Services', browse to Console Root|Component Services|Computers|My Computer|DCOM Config.
In the list, locate the DrWEBCOM Service
Select 'Properties'.
Select the Security tab.
Change 'Launch and Activation Permissions' to 'Use Default'.
Change 'Configuration Permissions' to 'Use Default'.
Select 'Apply'.
Restart the DRWebCOM Service'.
Cause:
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In Windows XP Professional Service Pack 2 (SP2), and Windows 2003 Service Pack 1 (SP1), a new DCOM infrastructure with enhanced access control restrictions was introduced. This can affect some DrWEb applications so that the launch permissions of the affected service are set incorrectly. Despite the error messages, Dr.WEB Anti-Virus for Windows 2000/XP/2003 will continue to function correctly, and the error messages can be safely ignored.
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It is standard behavior for some antiviruses
John S.G.