Article ID: 892896 - View products that this article applies to.
After you install Windows XP Service Pack 2 on a computer that is connected to the Internet by a DSL modem or by a cable modem, you may receive anerror message that resembles the following:
Limited or no connectivity: The connection has limited or no connectivity. You might be unable to access the Internet or some network resources.
This error message can be caused by several things. This article discusses the most likely causes and suggests what you can try to resolve the issue. However, this error message can also be displayed when, in fact, you are already connected to the Internet. If that is the case, you can safely ignore the error message.
First try to determine whether you can connect to the InternetYou should first try to determine whether you can connect to the Internet. If you can connect, the error message is obviously incorrect. If that is the case, you might want to disable the error message. To disable the error message, follow these steps.
Check for other causes and solutionsIf you cannot connect to the Internet, you have to find the reason. Realize that the reason may not be with your computer, but may be an issue with your Internet service provider (ISP) or with issues on the network at your work. Therefore, for some of these solutions, you might need help from your ISP, or, if your computer is part of a network at work, you may have to ask your network administrator for help.
Contact your ISP serviceIf you use an ISP to connect to the Internet, before you go any further, first contact your ISP to see whether it is experiencing any problems. If the ISP has problems, wait until the problems are resolved before you continue to troubleshoot.
Check the hardware devicesIf you still cannot connect to the Internet after you have confirmation that your ISP is not experiencing any problems, manually check the hardware devices on your small office network or your home network for problems. For example, if a hub, router, modem, or access point is installed on your network, check that it is connected correctly, and that it is turned on and functioning properly. The solution might be as simple as turning on or restarting a hardware device, and then restarting your computer. For more specific troubleshooting information about the hardware devices that you are using, refer to the hardware documentation for your devices.
Run the Network Diagnotics toolIf checking and restarting your hardware device did not resolve the issue, your computer may have a networking problem. For example, your computer may not have an IP address or your TCP/IP settings may be corrupted.
There are tools available in Windows XP that you can use to help you diagnose and troubleshoot networking problems. To use the Network Diagnostics tool to determine the source of the issue, follow these steps:
Additional troubleshooting information for TCP/IP issuesFor more information about how to troubleshoot TCP/IP networking problems and use the Network Diagnostics tool, click the following article number to view the article in the Microsoft Knowledge Base:
314067For more information about how to troubleshoot home networking in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/314067/ )How to troubleshoot TCP/IP connectivity with Windows XP
308007If the Network Diagnostics tool did not help you resolve the issue, try the next solution "Check the hardware device" in this article for help.
(http://support.microsoft.com/kb/308007/ )How to troubleshoot home networking in Windows XP
Check the network adapter on your computerIf you did not find a resolution by using the Network Diagnostics tool, check the network adapter on your computer to make sure that it is enabled. If it is enabled, you can sometimes solve connection problems by disabling and then re-enabling the adapter. If you are not sure how to check the network adapter, check the help that is provided with the network adapter.
Check your Dynamic Host Configuration Protocol (DHCP) serverIf the network adapter is working correctly, the next thing to check is whether your DHCP server is down or is not available on the network.
To troubleshoot issues with the DHCP server, it is important to know where the DHCP server is located. If you are not sure, it is probably hosted by your ISP (if you use an ISP), on another computer (if you are on a work network), or on a router (on your small office network or home network). Use the following suggestions, depending on the network setup:
Check your Wired Equivalent Privacy (WEP) keyIf your computer uses a wireless network, you may be required to supply a WEP key. (A WEP key is a network security key that is used to help protect your wireless network.) If you supply an incorrect key, or if you do not have a WEP key set, you will be unable to connect to the network. Therefore, make sure that you have the correct WEP key if it is required. For more information, see the help provided with your wireless network device or ask the person who set up the wireless network for help.
If these troubleshooting steps did not help, see the "Next Steps" section for other sources that may help you resolve your problem.
If these methods did not resolved your issue, you may want to ask someone you know for help, or you may want to contact your ISP service or network administrator for help. You can also use the Microsoft Customer Support Services Web site to find other solutions to your problem. Some services that the Microsoft Customer Support Services Web site provides include the following:
For more information about how to troubleshoot Internet connectivity in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/892889/ )You may receive error 678 or error 769 when you try to connect to the Internet or when you try to browse the Internet after you install Windows XP Service Pack 2