What's going on when the computer can't connect to the Internet?

The reasons why the computer cannot connect to the Internet include network connection problems, IP address problems, DNS problems, firewall and security software, network adapter problems, MAC address filtering, DHCP service problems, network driver problems and other problems. Detailed introduction: 1. Network connection problem. First check whether the computer is connected to the correct network and ensure that the network connection is normal. Try to restart the router, modem and computer to solve possible network device problems. Make sure that the network cable is firmly connected and not damaged or damaged. Loose; 2. IP address issues, etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

The computer's inability to connect to the Internet may be caused by a variety of reasons. Below I will introduce some common causes and solutions to help you solve the problem of computer unable to connect to the Internet.

1. Network connection problem:

- Check the network connection: First check whether the computer is connected to the correct network and ensure that the network connection is normal.

- Restart network devices: Try restarting your router, modem, and computer to resolve possible network device issues.

- Check the network cable: Make sure the network cable is firmly connected and not damaged or loose.

2. IP address problem:

- Obtain an IP address automatically: Make sure the option to automatically obtain an IP address is selected in the computer's network settings to obtain the correct IP address.

- Release and renew the IP address: Execute the ipconfig /release and ipconfig /renew commands through the command prompt to release and renew the IP address.

3. DNS issues:

- Change DNS server: Try changing your computer’s DNS server settings to use other reliable public DNS servers, such as Google’s 8.8.8.8 and 8.8.4.4.

- Flush the DNS cache: Execute the ipconfig /flushdns command through the command prompt to refresh the DNS cache.

4. Firewall and security software:

- Check the firewall settings: Make sure the firewall is not blocking the computer's connection to the Internet. You can try disabling the firewall or adding corresponding exception rules.

- Check security software: Some security software may block your computer's connection to the Internet. You can try disabling or adjusting the settings of the security software.

5. Network adapter problem:

- Reset the network adapter: Execute the netsh winsock reset command through the command prompt to reset the network adapter.

- Update the network adapter driver: Make sure that the computer's network adapter driver is the latest, you can try to update the driver.

6. MAC address filtering:

- Check router settings: Some routers may have MAC address filtering enabled, limiting the devices that can connect to the network. Check the MAC address filtering settings in the router settings to make sure the computer's MAC address is allowed to connect.

7. DHCP service issues:

- Check the DHCP service: Make sure the DHCP server in the network is running normally and can assign the correct IP address and other network configurations to the computer.

8. Network driver issues:

- Update network driver: If your computer’s network driver is outdated or damaged, it may result in the inability to connect to the Internet. Try updating your network driver. You can download the latest driver from the computer manufacturer's official website or the network adapter manufacturer's website.

9. Other issues:

- Check the service provider: If none of the above methods solve the problem, it may be due to a problem with the network service provider. You can contact the network service provider to inquire about whether there is a network failure or maintenance work.

It should be noted that the above are some common solutions, but the specific situation may vary depending on the network environment, device configuration and software settings. If the problem persists, it is recommended to consult a network professional or contact the device manufacturer's technical support for more accurate and professional help.

In summary, the computer's inability to connect to the Internet may be due to network connection problems, IP address problems, DNS problems, firewall and security software settings, network adapter problems, MAC address filtering, DHCP service problems, and network driver problems. Caused by various reasons. When solving the problem, you can gradually investigate and adjust according to the specific situation, and try different solutions to solve the problem of the computer being unable to connect to the Internet.

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