I am not sure if this is the right place to ask this. But I noticed sometimes on my network strange location. Here are the pictures. I am using Windows 7 Professional.
And after doubleclick:
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It's just another computer in your network.
In other words, wifi? If you've a router at home, which has multiple devices connected to it, they will list under your network.
You tried to access it, and it asked you to enter credidentials.
This is off topic, but very important:
Always set a proper password for wireless connections, or anyone can connect.
Because anyone can connect, anyone can also hijack your traffic. This includes passwords sent in plain text, website sessions (facebook etc.) or even access your online banking service, if you use it and the session is active.
MITM (Man-In-The-Middle) attacks are extremely easy to perform, for example, you can do all the things listed above with a single application on a rooted android device.