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Event ID: 15016 Source: HttpEvent

Source
Level
Description
Unable to initialize the security package Kerberos for server side authentication. The data field contains the error number.
Comments
 
For additional comments about this type of problem, see the link below to Event id 15601 from Microsoft-Windows-HttpEvent.
As per ME949213, this error can be safely ignored. It has to do with Vista and SP1 in a workgroup ( using a Windows Vista configuration that does not have and that does not require a security package for HTTP service authentication).

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