Event Message:

The browser was unable to promote itself to master browser. The computer that currently believes it is the master browser is computer name.

Source

Event Log

Event ID

Event Type

Browser

System

8009

Error

Explanation:

In a workgroup or domain, only one computer is allowed to be the master browser. Another computer in the workgroup or domain is functioning incorrectly as the master browser.

User Action:

Contact your network administrator to stop the specified computer by exiting Windows. The network administrator can change the TCP/IP protocol configuration to the correct subnet mask.