You Receive the Network Error Limited or No Connectivity

If you are receiving this error, you should run the Microsoft patch (KB884020 ) for it. Follow the instructions below to do this. Alternatively, you can download a zip file with the patch, registry file, and instructions by clicking here.

1) Download the patch from PC SWAT
2) Run the update to install it
3) Run this short Registry fix to complete the update. Type the following lines in Notepad and save the file as FixReg.reg on your desktop, then double click on it to install into your registry.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesIPSec]
"AssumeUDPEncapsulationContextOnSendRule"=dword:00000002

4) Reboot your computer

If you experience the error message again, reboot your computer first. In most cases this will solve many connectivity issues that are not associated with this SP2 bug.

My Connection Works, Can I just disable the warning message?

If your local area connection is working properly and you simply want to disable the warning message follow these steps.

1) Open Control Panel
2) Open Network Connections and Right Click on the Local Area Connection and click on Properties
3) Uncheck the following option on the General Tab

"Notify me when this connection has limited or no connectivity"

4) Click OK and close the Network Connections window

Other Causes For This Problem

If you are still experiencing this error message even after running the patch shown above, you may be experiencing one of several problems shown below:

1) Your Network or DSL router may have bad or missing information. Powercycle your router and/or rebuild the configuration in your router.

2) Double-check your cabling to the computer. Make sure you have the correct type of cabling, straight-through CAT 5 or possibly a crossover cable and try another cable or test the cable to make sure its working properly.

3) Check your network card to make sure its configured correctly and working properly. Many times setting the network card to 10Mbps/Full Duplex will solve this issue. To do this, open Control Panel, System, Device Manager. Go to the properties of the Network card, click on the Advanced tab and find the Link Speed and Duplex section. Change it from Auto Detect to 10Mbps/Full Duplex.

4) Check and test your firewall. Your firewall, especially if its a software firewall like ZoneAlarm, Black Ice, Norton Firewall or something else could be blocking the connection. Disable your firewall and test the connection. You may have to resolve the problem by even uninstalling and reinstalling the firewall.

5) Check your IP address assignments and workgroup settings in the computer for accuracy.

6) Reset your TCP/IP stack by downloading and running WinsockXPFix.exe a Visual Basic program designed to fix corrupted TCP/IP issues, host file problems and a variety of other connectivity issues.