Event Message:

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

Source

Event Log

Event ID

Event Type

Browser

System

8020

Error

Explanation:

In any 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, but the computer is not recognized.

User Action:

Contact your network administrator to find the other computer.