Yellow exclamation mark appearing over my wireless connection Icon, error: no internet access

I have seen the same issue working with a different vendors wireless solution. When I sniffed the air with OmniPeek and the network the ap was on with WireShark, I see the arp request for the gateway go to the router, the reply from the gateway router is sent out to the suspect machine in the air, the PC ack's the packet but never populates the arp cache. I have looked at both arp responses in a working vs failing scenario, both packets are the same. I don't see this being a wireless vendor issue, it's more of a Microsoft problem.

The only way I have been able to resolve it was to disable IP Helper (start up too) from Services, reboot the machine. I was seeing 3 to 4 drops per day but since disabling this Service the machines I have been testing with have not seen the issue again. It's worth trying.

IP Helper:

Provides tunnel connectivity using IPv6 transition technologies (6to4, ISATAP, Port Proxy, and Teredo), and IP-HTTPS. If this service is stopped, the computer will not have the enhanced connectivity benefits that these technologies offer.

Machines Tested and Fixed:

Lenovo E540

Lenovo W540

Acer Aspire One

Dell Latitude E6420

The ip helper service change was made on 40 laptops, a dozen of which would fail in about an hour. So far 0 out of the 40 has seen the issue since making the change and rebooting (rebooting is key after the disable) the laptops. It's been about 5 days.

I have a similar question.  I connect thru cable to a Verizon Jetpack hotspot.  When I remove the cable, the "Internet Access" gets a yellow exclamation point.  Later, we I plug in cable to get internet, it does not work.  Also, both USB ports on the front of computer (same that I used for internet) stop working.  My print jobs also get stuck in the print queue.  When trying to restart the computer, it keeps shutting down and the computer has to be turned off.   Why would removing the Jetpack cable cause the computer to have numerous issues?  Thanks.

What router make and model? What internet service provider? Is access to the router secured by a password?

Hi,

 Did you make any changes on the computer before this issue started?

Follow these methods and check.

Method 1:

Wired and wireless network connection problems in Windows

http://windows.microsoft.com/en-US/windows/help/wired-and-wireless-network-connection-problems-in-windows

Method 2:

Step 1:

Perform Clean Boot and check.

To help troubleshoot error message, you can start Windows Vista or Windows 7 by using a minimal set of drivers and startup programs. This kind of startup is known as a "clean boot." A clean boot helps eliminate software conflicts.

How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

http://support.microsoft.com/kb/929135

Please note: After the troubleshooting, make sure to boot your computer to normal mode by following the step 7.

Step 2:

You may also temporarily disable security software and check if the issue persists. Make sure to enable that security software on the computer after checking.

http://windows.microsoft.com/en-us/windows7/Turn-Windows-Firewall-on-or-off

http://windows.microsoft.com/en-US/windows7/Disable-antivirus-software

If disabling the security software resolves the issue then, please contact the specific security software manufacturer to resolve the issue.

Important Note: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.

Hope the above information is helpful.