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Types of events

Updated: January 21, 2005

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Types of events

Event Viewer displays five types of events:


Event type Description


A significant problem, such as loss of data or loss of functionality. For example, if a service fails to load during startup, an Error will be logged.


An event that is not necessarily significant, but might indicate a possible future problem. For example, when disk space is low, a Warning might be logged.


An event that describes the successful operation of an application, driver, or service. For example, when a network driver loads successfully, an Information event will be logged.

Success Audit

Any audited security event that succeeds. For example, a user's successful attempt to log on the system will be logged as a Success Audit event.

Failure Audit

Any audited security event that fails. For example, if a user tries to access a network drive and fails, the attempt will be logged as a Failure Audit event.

For more information, see:

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