Event ID 26 — Channel Initialization

Applies To: Windows Server 2008 R2

Event logs are normally initialized when the Event Log service starts. This initialization can also happen during installation of a component that creates a new log. When the initialization fails, the log is not available to receive events and the diagnostic and troubleshooting capabilities of administrators, support personnel, developers, and automated utilities can be compromised.

The application-defined logs are specific to the event provider that created them and will only affect events published by that provider. The operations that remain for the Event Log service and all other event providers are not affected when there is a problem with one of the event logs being initialized.

Event Details

Product: Windows Operating System
ID: 26
Source: Microsoft-Windows-Eventlog
Version: 6.1
Message: The event logging service encountered a log file for channel %1 which is an unsupported version. The log was renamed with a .UnsupportedVer extension.


Open the renamed log file

The log file associated with the channel has version that is too new or too old for the Event Log to use correctly. To fix this problem, open the renamed log file on the system where the file was created.


Use the Event Viewer to read the affected log on the local computer after the computer has been restarted, and verify that events 20, 23, 25, 26, or 40 did not appear in the event log after the system was restarted.

Channel Initialization

Management Infrastructure