Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->Policy Change->Audit Policy Change->EventID 4905 - An attempt was made to unregister a security event source.
EventID 4905 - An attempt was made to unregister a security event source.

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. Only audited when success auditing is enabled for the "Audit Policy Change" subcategory.

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:


Windows 2003
Related events:
 Sample:
Log Name:      Security
Source:        Microsoft-Windows-Security-Auditing
Date:          10/27/2009 9:52:55 PM
Event ID:      4905
Task Category: Audit Policy Change
Level:         Information
Keywords:      Audit Success
User:          N/A
Computer:      dcc1.Logistics.corp
Description:   
An attempt was made to unregister a security event source.
Subject
	Security ID:		S-1-5-18
	Account Name:		DCC1$
	Account Domain:		LOGISTICS
	Logon ID:		0x3e7
Process:
	Process ID:	0x69c
	Process Name:	C:\Windows\System32\dfsrs.exe
Event Source:
	Source Name:	DFSR Audit
	Event Source ID:	0x2124ad
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows Vista (2008)
Windows 7 (2008 R2)
Windows 8 (2012)
Windows 8.1 (2012 R2)
Windows 10 (2016)
Category Policy Change
Source Microsoft-Windows-Security-Auditing
TaskCategory Audit Policy Change
EventId 4905
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
Task Category A name for a subclass of events within the same Event Source. TaskCategory
Level Warning, Information, Error, etc. Level
Keywords Audit Success, Audit Failure, Classic, Connection etc. Keywords
Category A name for an aggergative event class, corresponding to the similar ones present in Windows 2003 version. Category Account Logon
Object Name -
Whom -
Object Type -
Class Name -
Security ID InsertionString1 S-1-5-18
Account Name InsertionString2 DCC1$
Account Domain InsertionString3 LOGISTICS
Security ID -
Account Name -
Account Domain -
Logon ID InsertionString4 0x3e7
Process: Process ID InsertionString7 0x69c
Process: Process Name InsertionString8 C:\Windows\System32\dfsrs.exe
Event Source: Source Name InsertionString5 DFSR Audit
Event Source: Event Source ID InsertionString6 0x2124ad
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