Master Browser Network

Find the Master Browser on a Windows 7 machine.
for /f “delims=\= ” %C in (‘net view ^| find “\\”‘) do @echo -Checking %C && @nbtstat -a %C | find “MSBROWSE”

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Browser]
“IsMasterBrowser”=”False”
“MaintainServerList”=”No”

Note:  You may have to run this command more than once if a browser election is taking place.
*Note2:  If you came here because the other computers on the network are disappearing randomly, try disabling your “DNS Client” service and see if that helps.
*Note3:  If you are still having problems, see my post on disabling Bonjour.  It really seems to mess things up at times.

To stop:
net stop “bonjour service”

To disable the service:
sc config “bonjour service” start= disabled

FORCE A PC TO BE MASTER BROWSER

HKLM/System/CurrentControlSet/Services/Browser/Parameters/MaintainServerList
It should be set to Auto. Then you can add the value IsMasterBrowser and set it to 1 to make that machine a master browser.

fonte:

http://windowsinstructed.com/fix-master-browser-stopping-election-forced/