First try to determine whether you can connect to the Internet You 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.
- Click Start, and then click Run.
- In the Open box, type ncpa.cpl, and then press ENTER. The Network Connections dialog box opens.
- Double-click Local Area Connection, and then click Properties.
- On the General tab, click to clear the Notify me when this connection has limited or no connectivity check box.
- Click OK, and then click Close.
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 tool If 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:
- Click Start, and then click Help and Support.
- Under Pick a task, click the link to Use Tools to view your computer information and diagnose problems, and then click Network Diagnostics in the list on the left.
- Click Scan your system.
The Network Diagnostics tool collects configuration information and
performs automated troubleshooting of the network connection.
- When the process is complete, look for any items that are marked "FAILED" in red.
If you do not see any categories that failed, please see the
"Additional troubleshooting information" section for more information
about how to troubleshoot network problems.
- Expand a category to view the testing results. For example, to check the results for TCP/IP settings, expand the Network Adapters section. Then, check whether a network adapter has failed.
You can use that information to try to resolve the issue yourself, or
you can provide the information to your network administrator for help.
If you are not sure how to use the results from the Network Diagnostics
tool to resolve the issue, see the "Next steps" section for help.
Additional troubleshooting information for TCP/IP issues
For 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:
How to troubleshoot TCP/IP connectivity with Windows XP
For 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:
How to troubleshoot home networking in Windows XP
If the Network Diagnostics tool did not help you resolve the
issue, try the next solution "Check the hardware device" in this article
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:
- If you use an ISP
you have not already done this, contact the ISP to see whether they are
experiencing any problems. If they are, wait until their problems are
resolved. If the ISP is not experiencing any problems, this is probably
not the problem that is causing the issue.
- If you are on a work network
a work network, the network administrator probably maintains the DHCP
server and should be able to tell you if the server is down or has
problems. Let them know that you have problems with your Internet
connection, and see whether they can help you. If you do not have a
network administrator or other support person to contact for help, you
can use the Microsoft Customer Support Services Web site to find other
solutions to your problem. See the "Next steps" section for more
- If you have a router on your small office network or home network
you have a router on your small office network or home network, then
the DHCP server might be hosted on the router. If you have not already
done this, check that the router is working correctly. For example, you
can check whether the router is turned on and that the wires are
connected correctly. You might have to check the router documentation
for troubleshooting help if you are not sure what to do, or contact the
person who set up the network for help.
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.