[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.

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.

2 – 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.

3 – 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.

6 – 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 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.

8 – 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. Reason for occurring error 651 could be incorrect IP configuration or 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 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.