Error 651 Connection in Windows 7/8.1/10 : Best Fixes

Error 651 Connection in Windows 7/8.1/10: Windows 10 is here, and the OS has been working just perfectly fine with all the features. However, one of the most annoyed errors in Windows 10 or even the older versions like Windows and Windows 8.1 would be the Error 651. The error usually occurs when the users to try to connect to broadband in Windows 7 or above OS running machines. There are quiet few fixes for this error, and we have tried our best bring out the working and best possible solution to fix Error 651 connection in Windows 10 and other PCs.

Error 651 Connection in Windows 7-8-1-10

When you try to connect your Modem, the Windows throws an error which is identical or similar to “Connection failed with error 651”. A quick fix for this error is to restart your modem and PC and then try to connect to the internet. If it fixes the issue, you don’t need to follow the below given methods, if not, proceed with the steps described in the article to fix this error in your PC.

How to Fix Error 651 Connection in Windows 7/8.1/10 – Steps for Troubleshooting

Begin with running the network troubleshooter to diagnose and identify the actual problem. Once you have found the problem, follow any one of the below given methods to fix it. If troubleshooting network didn’t show any specific problem, try each one of the below-mentioned steps until the Error 651 connection is fixed.

Windows Network Troubleshoot diagnostic

Method 1: Uninstall and Reinstall the Modem

This would be the most quickest solution to fix Error 651 Connection in Windows 7 or above. Simply uninstall the Modem you have installed on your PC and then reinstall the latest available update. Once done, try to connect to the internet and see if it resolves the error.

Method 2: Create a New Network Connection

At times, creating new network connection can resolve this error for you. This is also true with WiFi hotspot in Windows 7 or above. So, simply try to create a new internet connection and see if it resolves the error.

To do this go to Control Panel > Network and Internet > Network and Sharing Center and click on Set up a new connection or network.

Method 3: Try Reseting your Mac Address

Error 651 can also occur when you change the system and try to connect to the internet using  same IP address that you used to use in your previous system. What you can do here is, simply reset the Mac Address. To reset the Mac address you can either login to user management page or ask your Internet Service provider to reset it for you. Once the Mac address has been restored, try to connect to the internet and see if the error has been resolved.

 Method 4:  Reinstall Network LAN Card Driver

If nothing seems working, try reinstalling the LAN Card Drivers. Even corrupted or outdated driver can also cause this error. So, simply uninstall the LAN card drivers and reinstall the latest available version of LAN Card.

Method 5: Disable IPv6 for your Internet Connection

Error 651 Connection in Windows 7-8-1-10- disable IPv6

If you have enabled IPv6 in your dialer modem, then try disabling it. There is no point in keeping IPv6 enabled when your ISP doesn’t support it yet or the area you live doesn’t have this facility. To disable the IPv6, right-click on your current active internet connection, select properties, and uncheck the box with IPv6 (TCP / IPv6).  Note that you have to only disable IPv6 and not IPv4.

Method 6: Turn off Windows 7 Auto Tuning

If you are using the router at your place for the Internet connectivity then try turning off the Auto Tuning feature in Windows 7. To do this open the command prompt as Administrator (or elevated command prompt) and then enter the following command:Error 651 Connection in Windows 7-8-1-10- disable auto tuning

“Netsh interface tcp set global autotuning=disabled”

Hit enter to execute the command. Once done, try connecting to the internet again and see if this fixes the issue for you.

So, these are the best methods to fix the Error 651 Connection in Windows 7/8.1/10. Do let us know what worked for you or if you have any better alternative to fix this error in the comment section below.

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One thought on “Error 651 Connection in Windows 7/8.1/10 : Best Fixes

  1. Subodh Sharma says:

    Thanks for sharing,
    this tutorial ..very helpful.

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