The problem lies in the router settings, IP configuration, DNS or local network services. The following methods can be solved by: 1. Check whether the router is connected to the network normally, check whether other devices can access the Internet, log in to the background to check the PPPoE dialing status, and restart the router; 2. Reset the IP and DNS configuration, run the ipconfig /release, ipconfig /renew, ipconfig /flushdns commands or use the network troubleshooting tool; 3. Check whether the firewall or security software intercepts network access, temporarily close the relevant software or adjust the Windows firewall settings; 4. Update or reset the network adapter driver, operate through the device manager or enable/disable the network card, and try to reset the system network function if necessary.

You are connected to Wi-Fi, but the web page cannot be opened or WeChat cannot send messages, prompting "no Internet access" - this situation is actually quite common on Windows computers. The problem may be with router settings, IP configuration, DNS, or local network services. The following investigation directions can basically help you solve most similar situations.

1. Check whether the router is connected to the network normally

Although your computer shows that it is connected to Wi-Fi, the router itself may not be connected to the Internet. You can see if other devices (such as mobile phones) can access the Internet normally. If none of them can be done, the problem is not on your computer, but on the router or broadband.

• Log in to the optical cat/router background to see if there is any prompt for PPPoE dialing failure
• Check if the network cable is plugged in, or try restarting the router

Sometimes the router is temporarily stuck and can be restored after restarting.

2. Reset network settings: IP and DNS configuration errors

If the IP address is not correctly obtained when Windows connects to Wi-Fi, it will cause "connected but unable to access the Internet". At this time, you can manually release and re-get the IP address, and refresh the DNS cache.

The operation steps are as follows:

• Open a command prompt (run as administrator)
• Enter the following commands in turn, and press Enter for each line you enter:

 ipconfig /release
ipconfig /renew
ipconfig /flushdns

If you are not sure what these commands are doing, you can also directly use the network troubleshooting tool that comes with Windows (right-click the network icon in the taskbar → Troubleshooting).

3. Check whether the firewall or security software is intercepted

Some third-party antivirus software or firewalls will misjudge network behavior, resulting in disconnection of the network but still maintain Wi-Fi connection. In this case, you can try temporarily closing the firewall or uninstalling the relevant software to see if it returns to normal.

In addition, the firewall that comes with Windows system may also have abnormal rules that affect network access:

• Go to Control Panel → “Windows Defender Firewall” → “Allow applications to pass through the firewall”
• Check whether the browser or other common software has been blocked

4. Update or reset the network adapter driver

Sometimes problems with wireless network card drivers can also lead to abnormal connections. You can update the driver through Device Manager, or try to disable and enable the network adapter.

Specific operations:

• Right-click Start Menu → Device Manager
• Expand "Network Adapter", right-click your wireless network card → Update driver
• Or right-click to select "Disable Device" and wait a few seconds before "Enable"

If it still doesn't work, you can also try to reset the entire network function in the network settings (Settings → Network and Internet → Status → Network Reset → Reset now)

Basically, these common reasons and treatment methods. When encountering this type of problem, don’t rush to change the equipment. Start with the simplest inspection, many of which are minor problems.

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