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Why can't I connect to a network?
A lot of variables are involved when you connect to a network: cables, network adapters, drivers, routers, and more. So troubleshooting network connection problems can be challenging. This article can help you find and fix problems with wired (Ethernet) and wireless (Wi‑Fi) network connections. Some common issues that can cause problems are:
•
A wireless network adapter switch is turned off
•
Airplane mode is turned on
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Disconnected or improperly connected cables
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Incorrect WEP, WPA, or WPA2 security keys or passphrases
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Missing updates
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Incorrect network connection settings
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Corrupted or incompatible drivers
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Hardware or software problems
Follow the steps in these numbered sections to try to solve the problem, and try connecting after each one. If the problem still occurs, move on to the next numbered section.
1. Use an automated troubleshooter
An automated troubleshooter can find and automatically fix some common networking problems. Run the Network troubleshooter first, and then test your network or Internet connection to see if the problem has been fixed.
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To open the Network troubleshooter
To open the Internet Connections troubleshooter
To open the Network Adapter troubleshooter
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2. Review these suggested solutions
If running a troubleshooter didn't solve the problem, look for the problem and corresponding solution in the following table.
Problem
Possible solutions
I can't connect to a home network.
If running the Network troubleshooter didn't help, here are some other things to check:
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Make sure the router and modem are turned on.
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If you're using a wired connection, make sure the network (Ethernet) cable is inserted into the network adapter in your PC. Each end of a network cable looks like this:
A network (Ethernet) cableA network (Ethernet) cable
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If you're using a wired connection, make sure the network cable isn't defective. You can test this by using a different cable that you know works properly.
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Make sure the cable is connected to the correct port on the router. It shouldn't be connected to the "uplink," "Internet," or "WAN" port. In addition, some routers disable the port next to the uplink, Internet, or WAN port, so try using a different one.
•
If your PC has a wireless network adapter, Windows will automatically detect wireless networks that are nearby. To see a list of wireless networks that Windows has detected, swipe in from the right edge of the screen (if you're using a mouse, point to the upper-right corner of the screen and move the mouse pointer down), tap or click Settings, and then tap or click the network icon The wireless network icon. If Windows doesn't detect a network that you think is in range of your PC, see Why can't I find a wireless network?
•
Many laptops and tablets have a wireless switch on the front or side of the PC. If your PC has a switch, make sure it's turned on. Some PCs also use a function key combination to turn the switch on or off. Check the information that came with your PC for details on locating the wireless switch.
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Make sure wireless communication is turned on.
To turn on wireless communication
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Use Device Manager to verify that your network adapter is working correctly.
To check your network adapter
Administrator permission required
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The network adapter driver might not be working properly. Download and install the latest version of the driver from the manufacturer's website.
•
Clear the DNS resolver cache.
To clear the DNS resolver cache
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For advanced information about troubleshooting wireless network problems, go to the Microsoft website and search for "A Support Guide for Wireless Diagnostics and Troubleshooting."
My wireless connection isn't connected when my PC resumes from sleep or hibernation.
There are two possible causes:
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Autoconnect is turned off for this network. The next time you connect to the network, select the Connect automatically check box.
•
When coming out of sleep or hibernation, your wireless network connection might not reconnect if the power options on your wireless adapter are set to a power-saving mode. Here's how to check or change your current power options.
To check or change power options
Note
I need to find my network security key.
If your PC is already connected to the network, and you're looking for the security key so that someone else can connect to the network, you can find it in your network settings.
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To find your network security key in your network settings
The wireless network iconThe wired network icon
If you're looking for the security key so that you can connect to the network, first check for a push button on the router. If you find a push button, press it and see if the router automatically adds your PC to the network. Some wireless router manufacturers set a default security key that you might be able to find on a sticker in the documentation or on the bottom of the router. If you still can't find it, you can open the wireless router settings webpage. This is where the security key is set up or automatically generated.
To find your network security key on your router settings webpage
Note
I need to reenter my network key.
You need to delete the network profile, and then reconnect to the network.
To delete the network profile and reconnect to the network
The wireless network iconThe wired network icon
Windows reports that my connection is "Limited."
This means the PC has successfully connected to the router, but the PC wasn't assigned a valid IP address, so you can't actually get to the Internet. If you're connected to a home network, try restarting the router. If you're connected to a domain network or a public network, contact the technical support for that network.
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3. Check your hardware
Many network connection problems are caused by hardware that isn't set up properly. Here's some information about how to check your cables, check or reset your modem, and check for problems with your network adapter.
Check the wireless switch (wireless networks only)
If you're using a tablet or laptop, make sure the network adapter switch or button is turned on. Many laptops have a physical switch somewhere on the top, front, or side that turns the network adapter on or off. There's usually an indicator light on the laptop that shows if the wireless network adapter is enabled. Tablets sometimes have a push button that controls this, with or without an indicator light.
Make sure all cables are connected properly
Loose or disconnected network cables, DSL or cable connections, telephone cords, USB cables, or power cables can cause network or Internet connection issues. Check all of these connections to make sure they're properly connected. This section mainly applies to wired networks, but if you're trying to connect wirelessly to your own home wireless network, you should check the modem and cabling to the modem as described below.
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To check DSL Internet connections
To check cable Internet connections
To check dial-up Internet connections
To check USB network adapters
If you’re having trouble determining the correct way to connect a cable, check the documentation that came with the modem, the network adapter, or the PC. If you made any adjustments to the cable connections, test for an Internet connection before going on to the next step. To test for an Internet connection, open your browser and try to access a website that you know exists.
Check the indicator lights on your modem
Check the indicator lights on your modem or Internet connection device (this can be a modem, a modem and a wireless router, or a combined router-modem device). Most of these devices have an indicator light that's labeled "Broadband link," "Internet," "Online," or something similar that indicates a connection to the Internet. If you're unsure, refer to the documentation that came with the device.
A typical cable modem (left) and DSL modem (right)A typical cable modem (left) and DSL modem (right)
Restart the modem
To update the settings on the modem or the router, restart the modem. This creates a fresh connection to the Internet service provider (ISP). Use one of the following methods to restart the modem, following the steps for your type of modem.
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To restart an external modem
To restart an internal modem
Verify that your network adapter is working
Use Device Manager to verify that your network adapter is working correctly.
To check the network adapter
1.
Tap or click to open Device Manager. Administrator permission required You might be asked for an admin password or to confirm your choice.
2.
Double-tap or double-click Network adapters, press and hold or right-click your adapter, and then tap or click Properties.
3.
Under Device status, check to see that the device is working properly.
4.
If the network adapter is disabled, tap or click Enable Device to enable it.
Note
Note
If the network adapter isn't working properly, you might need to download and install the latest driver for it. (If you received an installation disc with the network adapter or with your PC, the driver might also be on the disc.)
If you're still having problems finding the latest driver for your hardware, go to "To download and install a dri
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