[Solved] Error 651 – Connection Failed with Error 651 in Windows

I have compiled a list of solutions that I have collected from various forums and help centers, all these solutions worked for many people and I’m sure that one of below solution will definitely work for you. So let’s start from basic troubleshooting steps to advance one.

1. Use a Different Connection

Consider experimenting with an alternative connection before delving into troubleshooting methods related to the system. Give a different connection a shot to assess whether the problem lies within the system itself or is associated with the connected device. This simple step can aid in pinpointing the source of the issue more effectively.

This is the most basic troubleshooting step, One can simply solve this error by reconnecting the internet connecting device. So if you are using router then simply turn off your router and after 5 minutes turn it on or if you are using LAN connection then unplug the wire and plug it back.

3. Reset TCP/IP On Your PC

Resetting the Windows networking stack can solve error 651 and luckily Windows 8/10 comes with a built-in tool you can use to do this just follow the below steps.

• Launch command prompt with administrative right.
• Copy the command given below and hit enter

netsh int ip reset reset.log 

• Restart your computer and hopefully, the problem will be solved.

4. Initiate the Network Troubleshooter

If you encounter network errors on your Windows PC, kick off the troubleshooting process by running the built-in Network troubleshooter. It’s a practical starting point that can identify and resolve a variety of connection issues you may encounter with your PC.

Follow these steps:

• Type “Control Panel” in the taskbar search area and click Open.
• In the ensuing window, enter “Troubleshoot” in the top-right search bar and choose “Troubleshooting” in Control Panel.
• Select “View all” from the left pane.
• You’ll now see a list of available troubleshooters in Windows. Look for “Internet Connections” and right-click on it.
• Choose “Run” from the context menu and follow the on-screen instructions.
• Allow the troubleshooter to complete its scan. If it proposes fixes, click “Apply this fix.” If not, click “Close the troubleshooter.”
• Repeat the same steps for “Incoming Connections” and “Network Adapter.”
• Afterward, restart your PC and check if the issue persists.

This method uses the Control Panel, but if you prefer a simpler approach, you can run the troubleshooter through Windows Settings:

• Press Win + I to open Windows Settings.
• Choose “Troubleshoot” from the left pane.
• Locate the “Internet Connections” troubleshooter in the right pane.
• If you can’t find it, click on “Other troubleshooters” in the right pane.
• Find the “Internet Connections” troubleshooter and click “Run.”
• If the initial scan identifies problems, click “Apply this fix.”
• If no issues are found, select “Close the troubleshooter” and proceed to the next method below.

5. Recreating Dial-Up Connection

Your internet connecting device might get hanged during the connection. So recreating your dial-up connection can fix this issue. So simply right click your Dial-Up or Broadband connection and select create copy and then delete your existing connection. Confused? Just follow the step by steps guide given below.

• Open Network & Sharing Center and click on Change Adapter Setting.
• Now right click your broadband or dial-up connection and select Create Copy.

• This will create a copy of your existing connection.
• Now simply delete your old connection and redial the new connection.

This solution worked for many users. You can simply disable IPv6 to fix this error. Follow the below guide to disable IPv6.

• Open Control Panel and select Network & Internet.
• Further, choose the Network & Sharing Center option.
• Now click on your active network connection.

• Select Properties and switch to Networking tab.

• Untick/Uncheck Internet Protocol version 6 (TCP/IPv6) and click on Ok.

8. Reinstall Network Adapter

This is the most working troubleshooting step when it comes to an internet connection problem. You can simply reinstall the network adapter to fix Connection Failed with Error 651 problem. Just follow the below guide to reinstall the network adapter.

• Go to Start and search for devmgmt.msc.
• Double click it to launch device manager, Now look for Network Adapters Category and click the “+” icon it’s left.

11. Perform Clean Boot

If there is a problem in Windows services then performing a clean boot can fix your problem, to perform a clean boot we simply need to disable all other services. Simply follow the below guide to perform a clean boot on your computer.

Frequently Asked Questions for Error 651?

What is Error 651 On Internet Connection?

Error 651 on Internet Connection indicates that there is some issue with your modem device. This error usually occurs on Windows devices. The reason for error 651 could be incorrect IP configuration or a network card driver issue

What is WAN Miniport PPPoE Error 651?

PPPoE stands for point-to-point protocol over Ethernet. This error occurs when a user tries to connect Windows 7 with an internet connection. It occurs because of a weak network connection.

How Do I Fix PPPoE Connection?

To fix the PPPoE Connection, you need to pay a visit to control panel settings of your Windows PC. Under the settings “Network and Sharing Center”, select broadband (PPPoE) and fix it.

What To Do When The DNS Server Isn’t Responding?

When the DNS server isn’t responding, you should first try restarting your computer. If it doesn’t help, check your router configuration and settings. Eventually, you may reset the router to the default settings.

I hope the above solutions helped you in solving error 651, If not then it might be your ISP’s issue, you should immediately contact your internet service provider (ISP) and report this issue.