Restart Windows Media Player Network Sharing Service
1. Click the Start Button, type "services.msc" (without quotes) in Start Search box, and press Enter.
2. Double click the service "Windows Media Player Network Sharing Service".
3. Click on the "General" tab; make sure the "Startup Type" is "Automatic" or "Manual". Then please click the "Start" button under "Service Status" to start the service.
4. Click OK.