Unknown Device on Network Map

Hi,

The network map is a graphical view of the computers and devices on your network, showing how they are connected. Sometimes Windows can't detect all of the computers and devices on a network, or can't place all of the computers and devices in the right location on the map. Here are some reasons for network map problems and related solutions.

The first time that you connect to a network, you must choose a network location. This automatically sets the appropriate firewall and security settings for the type of network that you connect to. If you connect to networks in different locations (for example, a network at your home, at a local coffee shop, or at work), choosing a network location can help ensure that your computer is always set to an appropriate security level.

Personal information and files on your wireless network can sometimes be seen by people who pick up your network signal. This can lead to identity theft and other malicious acts. A network security key or passphrase can help protect your wireless network from this type of unauthorized access.

For more information, I would suggest you to refer these links:

http://windows.microsoft.com/en-US/windows-vista/Troubleshoot-problems-with-computers-not-appearing-on-the-network-map
http://windows.microsoft.com/en-us/windows7/Choosing-a-network-location
http://windows.microsoft.com/en-us/windows7/Set-up-a-security-key-for-a-wireless-network

Please respond back for the status on the issue and let us know if you have any issues.

 Thanks and Regards,
Azam – Microsoft Support.