WMPNetworkSvc (Windows Media Player Network Sharing Service) is a
Windows service. You can disable it if you do not need to share your WMP media libraries over the network or homegroup.
To disable it, right click
Computer icon on desktop or Start Menu and select
Manage, go to
Services in management console, double click
Windows Media Player Network Sharing Service, and on properties window that opens, select
Disable from drop down menu:
To temporarily stop the service, you can also type
net stop WMPNetworkSvc to elevated command prompt and hit
Enter.
Kari