Troubleshooting the Windows "Limited or No Connectivity" Error

Sometimes you may get the message "This connection has limited or no connectivity. You might not be able to access the Internet or some network resources." This basically means that your computer is having trouble accessing your network device and connecting to the Internet. There are several solutions to this problem.

One possible cause for this problem is a bug in Service Pack 2 on Windows XP, which causes a loss of network connectivity for workstations using Microsoft's L2TP-based virtual private networking, or VPN, client to connect to NAT-based networks.

If fixing the bug doesn't provide a solution, there may be another underlying cause. Try reinstalling your firewall, reconfigure your router, reduce your connection speed to 10 Mbps, or assign IP addresses to your computer.

If you have just installed Windows XP Service Pack 2, you can determine if you have the aforementioned bug. One of the symptoms is if you have trouble connecting to your LAN network, you keep receiving the "Acquiring IP Address" message, or receiving the "Limited or No Connectivity" message.

In order to fix this problem, you should run Microsoft patch (KB884020). The patch can be downloaded from here. When you have located and downloaded the patch, run the update and install it.

You will also need to install a registry fix from here.

Open Notepad and type [HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesIPSec]
"AssumeUDPEncapsulationContextOnSendRule"=dword:00000002. Save the file as fixreg.reg. Once you have saved the document to your desktop, double-click the file. The file will now be installed onto your directory. When you restart your computer, the error message should be gone.

If your connection works, but you still see the message, you can manually disable the message. You can do this by clicking Start and then Control Panel. Double-click the Network Connections icon. Now you need to right-click on the Local Area Connection icon and click Properties. Click the General tab and uncheck the option labeled Notify me when this connection has limited or no connectivity. Click OK when have done this.

If you still get the error after using all of the provided methods to troubleshoot, the problem might be caused by a hardware malfunction. You should check your DSL router for any malfunctions. The problem may also lie with the network cabling on your computer and your network card configurations. You may also need to reset your firewall to see if your own firewall is preventing you from connecting to the Internet.