Windows 7 LAN connection multiple connections

Everytime I start up my computer, my LAN connection connects to two networks.  One is the right network, our local network, and the other is labeled as "Unidentified network".  When this happens, I cannot connect to any website or ping anything; basically, the second connection prevents the network from working.  See attached screenshot of the network center & ping results when the 2 connections are active.  I can solve this problem by disabling and re-enabling the network connection.  When I do this, the unidentified network goes away leaving on the real local network, and then everything works correctly.  See attached screenshot right after the connection is re-enabled and reconnects to the network (correctly).

We are using Windows 7, this is a relatively fresh install (a few weeks), and I do have the most updated driver for my network card, which is a generic Realtek PCI network card anyways.  I would like to just completely disable this unidentified network completely, it is a public network which I would never use, but I have no idea where it's coming from or what is causing it to auto-connect.

My desktop, where this problem is occurring, is connected to a switch that connects to the router that connects to the cable modem and there to the internet.  There is a wireless laptop that connects to the router and never has a problem connecting.  Every computer is running Windows 7.  See attached network map of a working connection (when there is only the one network connection).

Thanks for any help or suggestions you can offer.
network-map.jpg
network-single-connection.jpg
network-multiple-connections.jpg
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dageyraAsked:
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TheBDPSr. Sys EngineerCommented:
Do you have multiple NIC's on this MOBO?
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dageyraAuthor Commented:
No, there is only one network card.  There may be two but the plate on the back of the workstation only has one available.
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naykamCommented:
Have you got itunes installed?

If so try disabling the bonjour service.

http://support.microsoft.com/?id=970313
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Scythe000Commented:
Does this PC have a wireless card installed? Does another computer have internet sharing enabled?
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dageyraAuthor Commented:
No, iTunes is not installed and there is no wireless card.  There is only a laptop on the network, this happens whether that laptop is connected to the network or not.  I don't know anything about internet sharing.  We have wireless and broadband connections, we have no need for internet sharing amongst individual machines.
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naykamCommented:
Try resetting your TCP/IP stack.

Go to Start > All Programs > Accessories > Command Prompt ** Right Click ** and run as administrator.

Then enter this command:

netsh int ip reset c:\resetlog.log

Restart your computer and see if the problem persists
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