Turning Off and On Network Discovery on Your Windows 7 Home Network
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Under the profile you wish to change, scroll to the Network Discovery section and click Turn Off Network Discovery or Turn On Network Discovery (default). Click Save Changes.
Follow these steps as needed to later turn off (or on) network discovery.
Network discovery requires the following services to be running on your computer: DNS Client, Function Discovery Resource Publication, SSDP Discovery, and UPnP Device Host. Additionally, Windows Firewall (and any other firewalls on your network) must be configured to allow network discovery. Refer to Windows Help and Support for more details.