Lỗi connection failed with error 651 trên win 10 năm 2024

An ideal world would be one in which you are able to connect to a stable network on Windows without any problems and surf the internet without encountering any interruptions. Sadly, the reality is quite different as it is common for Windows users to encounter network issues now and then.

One such issue is the "Connection Failed Error 651" message. This pops up when the system fails to connect to the targeted connection or an already-established connection gets interrupted. Below, we have discussed a few effective fixes that can help you fix this issue and connect to a wireless connection successfully, in detail.

1. Try a Different Connection

Before you move towards the system-related troubleshooting methods, we recommend that you try a different connection and see if that works. This will help you determine if the issue is within the system or the connected device.

You can also while you are at it.

2. Run the Network Troubleshooter

If you face any kind of network error on your Windows PC, then running the Network troubleshooter that is built into Windows is a good place to start the troubleshooting process.

This troubleshooter can identify and fix most, if not all issues that you might face while connecting your PC to a network or using a connection. If the troubleshooter finds issues within the system that might be causing the problem, it will suggest relevant fixes that you can apply with a single click.

Here is what you need to do:

1. Type "Control Panel" in the search area of the taskbar and click Open.
2. In the following window, type Troubleshoot in the search bar at the top-right and select Troubleshooting.
3. Now, select View all from the left pane.
4. You should now see a list of available troubleshooters in Windows. Look for Internet Connections and right-click on it.
5. Choose Run from the context menu and follow the on-screen process to proceed.
6. Wait for the troubleshooter to complete its scan. If it suggests any fixes, click on Apply this fix. If not, click on Close the troubleshooter.
7. Perform the same steps for Incoming connections and Network Adapter and run them as well.
8. Once done, restart your PC and see if the issue is now resolved.

This is one way of running the Network troubleshooter in Windows. If you are not comfortable using the Control Panel, you can opt for a more simple approach — running the troubleshooter via Window's Settings.

Here is how you can do that:

1. Press Win + I together to open Windows Settings.
2. Choose Troubleshoot from the left pane.
3. Now locate the Internet Connections troubleshooter in the right pane.
4. If you cannot find it, click on the Other troubleshooters option in the right pane.
5. Locate the Internet Connections troubleshooter and click on the Run button associated with it.
6. If after the initial scan troubleshooter finds any problems, click on Apply this fix.
7. In case no problems are found, select the Close the troubleshooter option and proceed with the next method below.

3. Reset TCP/IP

You might also be facing the issue due to an issue within the TCP or IP settings. In this case, resetting the TCP/IP settings to their default state can help you fix the problem. Doing so will revert configured settings of DNS and other network-related components within Windows.

Follow these steps to proceed:

1. Press Win + R keys together to open Run.
2. Type cmd in Run and press Ctrl + Shift + Enter keys together to open Command Prompt with administrative privileges.
3. Inside the Command Prompt window, type the command mentioned below and hit Enter to execute it. netsh int ip reset reset.log
4. Once the command is executed, restart your PC and check if you can connect to a network without any problems now.

4. Disable IPv6

Another fix that worked for users was disabling IPv6 in the WiFi properties. This internet protocol version is not required for most connections, so disabling it will not affect the connectivity performance of your computer.

Here is how you can disable it:

1. Locate the network icon on the taskbar and right-click on it.
2. Choose Network and Internet settings.
3. In the following window, click on Advanced network settings.
4. Head over to the Related settings section and click on More network adaptor options.
5. Locate the network you are having issues with and right-click on it.
6. Choose Properties.
7. In the following dialog, locate Internet Protocol Version 6 (IPv6) and uncheck the box associated with it.
8. Click OK to save the changes.

Once done, try connecting your PC to the targeted connection again and check if it works now.

5. Update the Network Drivers

For you to connect to a network and use it, the network drivers on your system must be up-to-date and functioning well. If for any reason they are not, you are likely to run into issues like the one at hand.

In cases such as these, updating the network drivers might do the trick for you.

Follow these steps to proceed:

1. Type Device Manager in Windows Search and click Open.
2. Inside the Device Manager window, expand the Network adapters section.
3. Locate the wireless adapter and right-click on it.
4. Choose Update driver from the context menu.
5. In the following window, click on Search automatically for drivers. If the system finds an updated driver version, it will install it.
6. Once done, close the Device Manager window and see if the problem is now fixed.

6. Reset Window's Network Configuration

The last method on our list involves to its default state.

If an issue within the network configuration is causing the problem at hand for you, resetting these settings will help you get around the error. However, you are likely to lose your saved connections in this method.

Surf the Internet Without Interruptions

Everyone deserves to use the internet without interruptions but sadly, the frequent network errors in Windows make this experience almost impossible. However, with the right troubleshooting methods and a bit of know-how, you can get your internet connection back up and running in no time.