Troubleshooting wifi card




















Ping statistics for If you see results like this and are getting a reply, then you have a connection to your Wi-Fi router, so there might be a problem with your modem or ISP.

Contact your ISP or check online on another device if you can to see if there's a service outage. If the results of the ping test indicate that you are not getting a reply from the router, try connecting your PC directly to your modem by using an Ethernet cable if you can. If you can connect to the internet using an Ethernet cable, it confirms the connection problem is due to the Wi-Fi router. Make sure you've installed the latest firmware and see the documentation for your router.

At the command prompt, run the following commands in the listed order, and then check to see if that fixes your connection problem:. Type netsh winsock reset and select Enter.

Type netsh int ip reset and select Enter. Uninstall the network adapter driver and restart. Windows will automatically install the latest driver. Consider this approach if your network connection stopped working properly after a recent update. Before uninstalling, make sure you have drivers available as a backup. Select Search on the taskbar, type Device Manager , and then select Device Manager from the list of results. Expand Network adapters , and locate the network adapter for your device.

After your PC restarts, Windows will automatically look for and install the network adapter driver. Check to see if that fixes your connection problem. If Windows doesn't automatically install a driver, try to install the backup driver you saved before uninstalling. Check if your network adapter is compatible with the latest Windows Update. If you lost your network connection immediately after upgrading to or updating Windows 11, it's possible that the current driver for your network adapter was designed for a previous version of Windows.

To check, try temporarily uninstalling the recent Windows Update:. Select the Start button, then enter settings. If uninstalling the most recent update restores your network connection, check to see if an updated driver is available:.

To learn how to hide updates, see Hide Windows Updates or driver updates. If you could successfully install updated drivers for your network adapter, then reinstall the latest updates. To do this, select the Start button, then enter settings. Using network reset should be the last step you try. This can help solve connection problems you might have after upgrading from Windows 10 to Windows It can also help to fix the problem where you can connect to the internet, but can't connect to shared network drives.

Network reset removes any network adapters you have installed and the settings for them. After your PC restarts, any network adapters are reinstalled, and the settings for them are set to the defaults. Network reset might set each one of your known network connections to a public network profile. In a public network profile, your PC is not discoverable to other PCs and devices on the network, which can help make your PC more secure. Under Network profile type , select Private.

Wi-Fi adapter manufacturers might have different advanced settings you can change based on your network environment or connection preferences. In Device Manager, select Network adapters , and then double-click the network adapter name. Select the Advanced tab and look for a Wireless Mode setting. Windows uses the Wi-Fi profile to save the settings that are needed to connect to a Wi-Fi network. These settings include the network security type, key, network name SSID , and so on.

To fix this, remove or "forget" the network connection, then reconnect to the network. When you forget a network connection, it removes the Wi-Fi network profile from your PC.

Select Wi-Fi , then select Manage known networks. Afterwards, select the Wi-Fi icon on the taskbar and try to reconnect to the network to renew the network connection. For more info, see Wi-Fi problems and your home layout. There may be additional troubleshooting steps you can try, depending on which symptoms you're having. To view these steps, check out Wi-Fi connection icons and what they mean.

Setting up a wireless network. How to find your wireless network password. Analyze the wireless network report. Wi-Fi tools and apps. Make a Wi-Fi network public or private in Windows. Afterwards, see if a Wi-Fi network you recognize and trust appears in the list of networks. Under Change your network settings , select Network troubleshooter. In the search box on the taskbar, type Command prompt.

In the search box on the taskbar, type Device Manager , and then select Device Manager from the list of results. If you lost your network connection immediately after upgrading or updating Windows 10, it's possible that the current driver for your network adapter was designed for a previous version of Windows. This can help solve connection problems you might have after upgrading from a previous version of Windows to Windows Unplug the power cable for the modem from the power source.

Some modems have a backup battery. If you unplug the modem and lights stay on, remove the battery from the modem. Wait at least 30 seconds or so. If you had to remove the battery from the modem, put it back in. Plug the modem back into the power source. The lights on the modem will blink. Wait for them to stop blinking. Plug your router back into the power source. Wait a few minutes for the modem and router to fully power on.

Connection problems can be due to a variety of reasons—problems with the website, your device, the Wi-Fi router, modem, or your Internet Service Provider ISP. Try the following steps to help narrow down the source of the problem.

If the "Wi-Fi connected" icon appears on the right side of the taskbar, visit a different website. If the website opens, there might be a problem with the specific website. If you can't connect to another website, go to the next step. On another laptop or phone, try to connect to the same network. If you can connect, the source of the problem is likely due to your device—go to the section Network troubleshooting on your device.

If you can't connect to the network on any device, continue to the next step. Check to see if there is a problem with the connection to your Wi-Fi router. Do this by using a ping test. Select Search on the taskbar, type Command prompt. The Command Prompt button will appear.

At the command prompt, type ipconfig , and then select Enter. Look for the name of your Wi-Fi network within the results, and then find the IP address listed next to Default gateway for that Wi-Fi network. Write down that address if you need to. For example: For example, type ping The results should be something like this:.

Reply from Ping statistics for If you see results like this and are getting a reply, then you have a connection to your Wi-Fi router, so there might be a problem with your modem or ISP. Contact your ISP or check online on another device if you can to see if there's a service outage. If the results of the ping test indicate that you are not getting a reply from the router, try connecting your PC directly to your modem by using an Ethernet cable if you can.

If you can connect to the internet using an Ethernet cable, it confirms the connection problem is due to the Wi-Fi router. Make sure you've installed the latest firmware and see the documentation for your router. At the command prompt, run the following commands in the listed order, and then check to see if that fixes your connection problem:.

Type netsh winsock reset and select Enter. Type netsh int ip reset and select Enter. Uninstall the network adapter driver and restart. Windows will automatically install the latest driver. Consider this approach if your network connection stopped working properly after a recent update.

Before uninstalling, make sure you have drivers available as a backup. Select Search on the taskbar, type Device Manager , and then select Device Manager from the list of results. Expand Network adapters , and locate the network adapter for your device.

After your PC restarts, Windows will automatically look for and install the network adapter driver. Check to see if that fixes your connection problem. If Windows doesn't automatically install a driver, try to install the backup driver you saved before uninstalling.

Check if your network adapter is compatible with the latest Windows Update. If you lost your network connection immediately after upgrading to or updating Windows 11, it's possible that the current driver for your network adapter was designed for a previous version of Windows. To check, try temporarily uninstalling the recent Windows Update:. Select the Start button, then enter settings. If uninstalling the most recent update restores your network connection, check to see if an updated driver is available:.

To learn how to hide updates, see Hide Windows Updates or driver updates. If you could successfully install updated drivers for your network adapter, then reinstall the latest updates.

To do this, select the Start button, then enter settings. Using network reset should be the last step you try. Reset Network Settings Open Settings. Click on Status. Under the "Change your network settings" section, click the Network reset option. Click the Reset now button. Click the Yes button. If issue persists, proceed with these steps.

Go to this link below and download the driver. Once downloaded save it to your desktop , don't install it yet. They can tell you about secondary indicators of interference, such as increased retransmissions and lower data rates, but they can't analyze interference problems, determine the cause of the interference, and help you find where the interfering device is located.

A second problem with the data from This means that the data you receive from an As a result, it is very difficult to put meaning on the numbers that packet sniffer devices report. Summary: You need the right tool for analyzing interference. In the end, it's critical that you be able to analyze the source of interference in order to determine the best course of action to handle the interference.

In many cases, the best action will be removing the device from the premises. Myth 7: "I have a wireless policy that doesn't allow interfering devices into the premises.

Having a wireless policy is a good first step in tackling the interference problem. But no policy is effective without enforcement. One of the great attributes of unlicensed band wireless devices is that they are inexpensive and widely available.

As a result, it's very easy for employees to purchase these devices and bring them to work. In many cases, these employees are not even aware that a particular device may cause interference with your wireless network. And some devices like cordless headsets and microwave ovens may be a necessary part of your business, so they can't be completely disallowed.

Summary: You have to expect that interfering devices will sneak onto your premises. Myth 8: "There is no interference at 5 GHz. It is generally true that fewer devices currently operating at 5 GHz are causing interference as compared to 2. But this will change over time. Just as everyone moved from MHz to 2. Some devices that already exist at 5 GHz include cordless phones, radar, perimeter sensors, and digital satellite.

Summary: You can run, but you can't hide. Myth 9: "I'll hire a consultant to solve any interference problems I run into. If you have been running a WLAN for some time, you will know that there are frequent instances where your network doesn't operate perfectly.

Without having your own visibility into interference, you are left to guess about whether or not interference is the problem. Lack of visibility is an issue for IT personnel, especially when the CEO is asking why he was having trouble yesterday connecting in the conference room. And beyond the issues of control, it's expensive and time-consuming to bring in a consultant to debug these kinds of problems.

Summary: You can't afford to rely on a third party to debug your network. Myth "I give up. RF is impossible to understand. Don't despair. Tools are now available that make RF easier to understand, even for those who consider themselves wired network specialists, not wireless experts. Summary: The cavalry is here! Myth "Wi-Fi interference doesn't happen very often. There is a growing body of evidence that points to the fact that Wi-Fi interference is an extremely common and troublesome issue.

Here are a few recent examples:. Summary: There's no point burying your head in the sand: Wi-Fi interference happens.

Myth "I should look for interference only after ruling out other problem sources. In any networking system, it's critical that the physical layer is solid. When the physical layer is not operating properly, the higher protocol layers tend to operate in inefficient and sometimes confusing ways.

For this reason, it always makes sense to verify your physical layer first before going on a wild-goose chase looking higher layer problems. As an analogy, when you hook your computer up to an Ethernet cable and the network does not appear to be working, your first diagnostic step is to look at the lights on the side of your Ethernet adapter.

If the lights are not on, there is no point looking for a subtle network configuration problem: you simply don't have physical layer connectivity. The potential for physical layer problems with Wi-Fi is much worse than with Ethernet. With an Ethernet cable, you worry about the physical-layer connectivity issue only the first time you plug in the cable.

If the connection was working that first day, it's reasonable to expect it will keep working day after day. But in the RF world, the quality of the physical connection can change hour by hour, as people introduce other devices or obstructions into the environment.

Summary: Avoid wasting your time. Fix your RF physical layer first. Myth "There's nothing I can do about interference if I find it. The most common cure for interference is simply to replace or remove the offending interference device. For instance, you might replace an old leaky microwave oven or a 2.

Many times interference is caused unwittingly by well-intentioned employees. One Wi-Fi administrator found an employee who sat with his back to his door, and had brought in a wireless camera so he could see behind him.

Unfortunately, it operated at 2. In this case, a policy was created to ban these types of devices on the campus. Another solution is to work around the interference device by moving the affected access point, or changing its operating channel to a frequency that is not impacted by the interfering device.

This is simple once you understand the location and frequency parameters of the interfering device. Note that because some devices frequency-hop for example, Bluetooth devices it's not always possible to change channels and eliminate the interference. A final cure is to move or shield the offending device. For example, in a hospital, a piece of equipment that causes RF interference might be isolated to a particular room where Wi-Fi network access is not critical.

If that's not possible, adding electromagnetic interference EMI shielding can limit propagation of the interference to a small area. You can implement shielding with grounded mesh or foils in the walls essentially Faraday cages or with insulating foams or paints.

Summary: There's always a cure for interference, but you need to know what's ailing you. Myth "There are just a few easy-to-find devices that can interfere with my Wi-Fi. With the huge proliferation of wireless devices in the unlicensed band, it is no longer obvious what might be a source of interference-wireless links are now embedded in watches, shoes, MP3 players, and many other tiny consumer devices.

In some cases, previously benign devices have been updated with RF technology. Motion detectors, which appear in many offices for lighting control, are a good example.



0コメント

  • 1000 / 1000