Suggestion:
It might be the Computer Browser Service. (see this description)
With multiple systems on the same LAN, every time a system is booted and it attaches to the LAN subnet,
there is A Browser Election that occurs (you can see it via the Event Viewer: start->run eventvwr.msc )
as "Event ID 8033 Source: Browser"
There's a tool mentioned here (Browstat.exe) but I've been content to use nbtstat -n to see this
Code:
C:\Users\Jeff>nbtstat -n
Local Area Connection:
Node IpAddress: [192.168.0.5] Scope Id: []
NetBIOS Local Name Table
Name Type Status
---------------------------------------------
JEFFPC7 <00> UNIQUE Registered
97THOFFICE <00> GROUP Registered
JEFFPC7 <20> UNIQUE Registered
97THOFFICE <1E> GROUP Registered
97THOFFICE <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered
Bluetooth Network Connection:
Node IpAddress: [0.0.0.0] Scope Id: []
No names in cache
The last line says that this laptop (JeffPC7) has the Master Browser active and has won the last election.
this entry
Code:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Browser\Parameters
IsDomainMaster REG_SZ = True
says this system will compete to become the Master Browser
This key { OsLevel REG_BINARY = ???? } is the priority for winning the election.
Mine shows OsLevel = 0033
Known Values for OsLevel are { 255, 33, 8}
255 -> Always Win
33 -> default
8 -> non-preferred but acceptble
For your case, I might suggest that you set OsLevel = 255 on the media PC