Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2000-2003->Security Log->Policy Change->EventID 809 - A security event source has attempted to unregister [Win 2003 / XP]
EventID 809 - A security event source has attempted to unregister [Win 2003 / XP]

This event record indicates that a process identified by the Process ID field successfully unregistered itself as being able to write events to the Windows security log.

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:

Windows 2008
Related events:
 Sample: 
Event Type:	Success Audit
Event Source:	Security
Event Category:	Policy Change 
Event ID:	809
Date:		30/04/2009
Time:		13:26:23
User:		RESEARCH\DC1$
Computer:	DC1
Description:
A security event source has attempted to unregister.

     Primary User Name: DC1$
     Primary Domain: RESEARCH
     Primary Logon ID: (0x0,0x3E7)
     Client User Name: DC1$
     Client Domain: RESEARCH
     Client Logon ID: (0x0,0x3E7)
     Source Name: IIS-METABASE
     Process Id: 1392
     Event Source Id: (0x0,0x105DC)
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows 2003
Windows XP
Category Policy Change
Source Security
EventId 809
Field Matching
FieldDescriptionStored inSample Value
DateTime Date/Time of event origination in GMT format. DateTime 10.10.2000 19:00:00
Source Name of an Application or System Service originating the event. Source Security
Type Warning, Information, Error, Success, Failure, etc. Type Success
User Domain\Account name of user/service/computer initiating event. User RESEARCH\Alebovsky
Computer Name of server workstation where event was logged. Computer DC1
EventID Numerical ID of event. Unique within one Event Source. EventId 576
Description The entire unparsed event message. Description Special privileges assigned to new logon.
Log Name The name of the event log (e.g. Application, Security, System, etc.) LogName Security
Category A name for a subclass of events within the same Event Source. Category Logon/Logoff
Primary User Name Name of the account under which the registration service is running InsertionString1 206602-DB1$
Primary Domain Domain of the Primary User InsertionString2 ANNADOMAIN
Primary Logon ID ID of the logon session of the Primary User Name account InsertionString3 (0x0,0x3E7)
Client User Name Name of the account initiating the action InsertionString4 206602-DB1$
Client Domain Domain of the Client User InsertionString5 ANNADOMAIN
Client Logon ID ID of the logon session of the Client User Name account InsertionString6 (0x0,0x3E7)
Source Name Source name as shown in security log InsertionString7 IIS-METABASE
Process ID ID of the process that unregistered the event source InsertionString8 1239
Event Source ID ID of the unregistered event source InsertionString9 (0x0,0x105DC)
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