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Win7 prompts 651 error: network connection failure solution Win7 is UEFA Champions League standingsone of the most classic versions of the Windows series operating systems. In the process of using Win7, we often encounter all kinds of problems, among which network connection failure is a relatively common one. Win7 prompts 651 error generally refers to network connection failure, which is very troublesome for users who need to work and study on the computer. Next, let's discuss the solution to the error of Win7 prompting 651. Step 1: Check the network connection. There may be many reasons for the failure of the network connection, but the most common reason is the abnormal network connection.Therefore, we should check the network connection first before doing other operations. In the Win7 operating system, we can check the network connection through the following steps: 1. Open the "Control Panel". Two. Click "Network and Sharing Center". 3. Select "Change Adapter Settings". Four. Check whether the network you are using is connected. 5. If "not connected" occurs, right-click the mouse button, and then select "Connect". 6. If you are using a wired network, you also need to check whether the network cable has been plugged in. Step 2: Update the driver. If the above method cannot solve the problem, you can consider updating the driver. The driver can help your computer communicate with the network device. If there is a problem with your driver, it is likely to cause the network connection to fail.In Win7, you can update the driver through the following steps: 1. Open "Device Manager". Two. Select "Network Adapter". 3. Right-click on the network adapter you are using, and then select "Update Driver". Four. In the pop-up window, select "Automatically search for updated drivers". 5. Wait for a period of time until the system automatically searches and updates the driver. Step 3: Disabling IPv6 is a commonly used method, because it is common to enable IPv6 in Win7 to cause network connection failure. If you have ruled out other problems other than the network connection according to the above method, you can consider disabling IPv6. The specific operation method is as follows: 1. Open the "Control Panel". Two. Click "Network and Sharing Center".3. Select "Change Adapter Settings". Four. Find the network adapter you are using and double-click it. 5. In the pop-up window, uncheck the "Internet Protocol Version 6 (TCP/IPv6)" option. 6. Click the "OK" button to save the settings. Step 4: Repair the system file. If none of the above methods can solve the Win7 prompt 651 error, then you can consider repairing the system file. Damaged system files may also be one of the reasons for network connection failure. In Win7, you can repair system files through the following steps: 1. Open the "Command Prompt". Two. In the pop-up window, enter the "sfc /scannow" command, and then press the "Enter" key. 3. Wait for the system to automatically scan and repair the system files.Four. After the repair is completed, restart the computer. Conclusion The above are some solutions to the 651 error prompted by Win7. Of course, not every method is applicable to all situations. You need to choose the most suitable method for yourself according to the specific situation. If you are not familiar with these methods, it is recommended to seek professional help to avoid unnecessary trouble. Finally, I hope this article will be helpful to you. I wish you a smooth network!

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