Event ID - 8020

Event Id8020
SourceBrowser
DescriptionThe browser was unable to promote itself to master browser. The computer that currently believes it is the master browser is unknown.
Event InformationCause:
There can be only one computer is allowed to be the master browser, in any workgroup or domain.

Resolution:
Find out whether any other computer is functioning incorrectly as the master browser.

The following information from newsgroup post may help:
"This may occur when a winNT system unable to contact BDC, after server comes up. Verify the network connectivity between these servers."
Reference LinksControl Network Browser Elections (Windows NT/2000/XP)

8003 Browsing Errors with UDP Forwarding

Windows 2000 browser service.MS Windows NT Browser.

Windows NT Browser.

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