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Windows 7 unidentified Network and stops NW access

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Windows 7 unidentified Network and stops NW access

Postby guest » Sun Nov 22, 2009 9:47 pm

I have an HP Pavillion PC which had Windows Vista Home Premium with all patches up to date. I upgraded to Windows 7 last weekend and ever since every time I reboot NW access fails. In Network Sharing there are 2 networks "Network 2" and "Unidentified Network". I have to disable the NW Adapter and enable each time to get rid of the "Unidentified Network" and recover NW access.
How can I fix this?
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Re: Windows 7 unidentified Network and stops NW access

Postby guest » Sun Nov 22, 2009 9:47 pm

Hi,



You can also try the following steps to troubleshoot the issue.



1. Bypass the router and connect to cable modem directly for a test. Do you need disable Local Area Connection now? If so, please let me know. Otherwise, please upgrade the router firmware and then connect to router again.



2. Temporarily turn off firewall on the machine and router (If it has).



3. Upgrade the NIC driver.



4. Restart the computer to Safe Mode with Networking to check the result.



5. Configure the connection to obtain an IP address automatically

=======================================

a. Click "Start", input "NCPA.CPL" (without quotation marks) to Start Search bar and press "Enter".

b. Right-click the network connection and click "Properties".



If you are prompted for an administrator password or confirmation, type the password or provide confirmation.



c. Click to highlight "Internet Protocol Version 6 (TCP/IPv6)" and click "Properties".

d. Check "Obtain an IP address automatically" and "Obtain DNS server address automatically".

e. Click "OK".

f. Click to highlight "Internet Protocol Version 4 (TCP/IPv4)" and click "Properties".

g. Check "Obtain an IP address automatically" and "Obtain DNS server address automatically".

h. Click "OK".

i. Reboot the computer.



What's the result now?



Thanks,

Novak
Tablet and Smartphone Setup Guide
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Troubleshooting Vista Wireless
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Re: Windows 7 unidentified Network and stops NW access

Postby guest » Sun Nov 22, 2009 9:48 pm

I have the same problem with Vista and 2008 Server.

The issue is that the ROUTE table contains a phantom persistent default route 0.0.0.0 to one of the network interface cards. This activates the "Unidentified Network" (Public) every time the network connection becomes active. Sharing permissions are turned off.

My solution is to use the Windows Command Screen as Administrator and remove all default routes.

ROUTE DELETE 0.0.0.0

This removes the default routes from all network interfaces. You must then reapply the necessary default routes to your interfaces (Do not use address of the network adapter as the default). If you have an isolated network (without any router, firewall, or gateway) with more than one computer -- I do this in a development laboratory -- is to choose for default address for Vista, 2008, Win-7, to be the IPv4 address of any other attached network interface.

I don't know why Microsoft deciced to make the default routes 0.0.0.0 persist in the routing table instead of just being bound to the network adapter. The network stack used by XP, 2000, 2003 systems do not have this problem.


I hope this helps!
Tablet and Smartphone Setup Guide
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Troubleshooting Vista Wireless
http://chicagotech.net/
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Posts: 9593
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