Once more: "No network access - unidentified network"

[taurus7050]

Hi all,

first of all please excuse my bad English. I'm writing from Germany. My question: Is it possible to delete all network settings in order to restore them automatically through Windows or manually? If yes, how to do this? Which registry keys and/or other settings must be deleted? Or do I have to reinstall Win7 RC completely?

The reason of my question: Since few days I'm confronted with the "No network access - Unidentified Network" problem on one of my three Win7RC-notebooks. It's the only network I can see and it's a wired connection. I didn't make any changes to Windows and on the router. The network diagnosis tells me that the IP-configuration is incorrect, but it doesn't say how and where to correct the settings. All necessary services are running, but it's impossible to create a new network connection. The router firmware is up to date and the router works fine for the two other Win7-laptops. They too have a LAN-connection to the network and the Internet.

I've tried the solutions suggested here in the forum, but unfortunately no one works. Reinstalling and updating the LAN cable driver also doesn't provide a solution. I have also imported the network and firewall settings from the two other notebooks, but it didn't solve the problem.

Many thanks for any help und kind regards

Taurus

 

[Dinesh]

Hi taurus and Welcome to the forums.
Lets fix this issue.
1: Click on Start and in the Start Search box, type ncpa.cpl and press Enter.
2: Right click on Local Area Connection and Click Properties.
3: Double Click Internet Protocol Version 4(TCP/IPv4).
4: Make sure you have Obtain IP address automatically and Obtain DNS server address automatically options checked(have a dot).

Let me know the results in order to proceed.

 

[taurus7050]

Hi dinesh,

many thanks for the prompt reply. Both options were and are activated but unfortunately the problem persists.

Kind regards
Taurus

 

[Dinesh]

Alright, now at the bottom right side of the screen, right click on the network icon and click Troubleshoot problems. Let me know what results it brings.

 

[srq2625]

Just a quick thought - this sounds a lot like what happens when the Bonjour service is installed and runs amuck.

To see if is installed/running take a look in "program files (x86)" for folder "Bonjour". If it's there, the following page might be of help....

Completly Uninstall and Remove Bonjour Service and Files (mDNSResponder.exe, mdnsNSP.dll) for Windows « Amarjeet Rai’s Blog

 

[Robert Cartman]

Try to disable and then enable again the network adapter in the device manager.
I heard it somewhere, may be will help.

 

[srq2625]

Try to disable and then enable again the network adapter in the device manager.
I heard it somewhere, may be will help.

If that does work, that's a symptom diagnostic pointing to the Bonjour service.

 

[taurus7050]

The results are:

LAN-connection has no valid IP-Configuration
The windows firewall is incorrectly configured
The HomeGroup Permissions are incorrect

(s. attachment; partly in German because of German Windows)

 

[taurus7050]

Just a quick thought - this sounds a lot like what happens when the Bonjour service is installed and runs amuck.

To see if is installed/running take a look in "program files (x86)" for folder "Bonjour". If it's there, the following page might be of help....

Completly Uninstall and Remove Bonjour Service and Files (mDNSResponder.exe, mdnsNSP.dll) for Windows « Amarjeet Rai’s Blog

Thanks, but there are no Bonjour files and folders on the laptop.

 

[Dinesh]

The results are:

LAN-connection has no valid IP-Configuration
The windows firewall is incorrectly configured
The HomeGroup Permissions are incorrect

(s. attachment; partly in German because of German Windows)

click on the 1st result.

 

[taurus7050]

Try to disable and then enable again the network adapter in the device manager.
I heard it somewhere, may be will help.

Thanks, but unfortunately the problem persists.

 

[taurus7050]

click on the 1st result.

Done. Nothing happens.

 

[Dinesh]

click on the 1st result.

Done. Nothing happens.

click start, in the start search box, type cmd and press enter.
in the black window, type ipconfig and tell me what's your ipv4 address and default gateway.

 

[taurus7050]

click start, in the start search box, type cmd and press enter.
in the black window, type ipconfig and tell me what's your ipv4 address and default gateway.

s. attachment

 

[zigzag3143]

IP problem

s. attachment

In the clip you showed us the Ip is listed as 169.254.x.x that means the nic is improperly conigured usually because of the driver. could you list you system specs and networking setup ( i haven't been here for the thread)

Ken

 

[Dinesh]

As said by Ken, 169.254.xx.xx is a bad ip address which is auto-generated by the OS when your router fails to give ip address to the pc. This time, click start and in the start search box, type cmd, then right click on cmd and click Run as Administrator, now in the black window, type netsh reset winsock catalog and press Enter, Restart the pc. If this doesn't work, try a system restore. or else, a clean install.

 

[Zidane24]

As said by Ken, 169.254.xx.xx is a bad ip address which is auto-generated by the OS when your router fails to give ip address to the pc. This time, click start and in the start search box, type cmd, then right click on cmd and click Run as Administrator, now in the black window, type netsh reset winsock catalog and press Enter, Restart the pc. If this doesn't work, try a system restore. or else, a clean install.

Has he updated his drivers for the NIC to the most current?

 

[Dinesh]

Has he updated his drivers for the NIC to the most current?

But a 169.254.xx.xx ip problem may not be solved bu updating the NIC driver. What i could also recommend is if you are using a modem to connect to internet, then unplug the ethernet cable from the compuer and turn off the modem, wait for 5 mins and turn it back on and then press the small RESET button on the modem. (This may work.) Then restart your computer and reconnect the ethernet cable to pc. Fingers Crossed.

 

[Zidane24]

But a 169.254.xx.xx ip problem may not be solved bu updating the NIC driver. What i could also recommend is if you are using a modem to connect to internet, then unplug the ethernet cable from the compuer and turn off the modem, wait for 5 mins and turn it back on and then press the small RESET button on the modem. (This may work.) Then restart your computer and reconnect the ethernet cable to pc. Fingers Crossed.

The only issue with this is that any specific router settings adjusted by the IP (like PPPoE settings) go out the windows...

I have an old desktop that used to do this in XP...I updated to the latest drivers and it fixed it. Was it luck? More than likely but all possible fixes might be needed for this issue

 

[Dinesh]

The only issue with this is that any specific router settings adjusted by the IP (like PPPoE settings) go out the windows...

I have an old desktop that used to do this in XP...I updated to the latest drivers and it fixed it. Was it luck? More than likely but all possible fixes might be needed for this issue

You can call it as luck but what i have noticed with my past experience is whenever you have this ip address, the only things you can try to fix it is:
1: Release and renew ip address.
ipconfig /release and ipconfig /renew in an elevated command prompt.
2: clear the winsock catalog by netsh winsock reset calatog command.
3: Reset the ISP modem.
4: Do a system restore.
If the above steps doesn't work, do a clean install.