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Event ID: 8004 Source: MRxSmb

Source
Level
Description
A request has been submitted to promote the computer to backup when it is already a master browser.
Comments
 
See EV100083 for a discussion thread about this problem.
As per Microsoft: "The master browser for My Network Places failed, and the browser service tried to promote a backup computer to be the master browser; however, the backup computer was already designated as a master browser. Multiple master browsers could be the result of a previous network problem. The computer browser service will establish the correct master browser automatically". See MSW2KDB for more details.

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