Error 651: Fix Connection Error 651 Windows 7/8/8.1/10

Fix Error 651Windows is the most popular OS available in the market. Large percentage of users in the world are using windows as their operating system. But it doesn’t mean that it is error free.
One of the error faced mostly by windows users is ERROR 651.

The Error Message will be like Error 651: The modem(or other connecting device) has reported an error.
So first lets see why this error occurs in windows.

Error 651

Causes of Error 651:

This error mostly happens when we are trying to connect to internet using PPPoE connections.
There might be various reasons responsible for this error:

  • IP Conflict : Sometimes it may occur that other person is trying to make a connection with the same IP Address you are using.
  • Registry Error
  • Raspppoe.sys file is placed in wrong location.
  • Router misconfiguration

How To Fix Connection Error 651:

If you are getting Connection Failed With Error 651 Error in your windows PC, then no need to panic. With these below mentioned solutions you can easily solve Connection Error 651.
After reading this post you will most probably be able to solve errors like error 651 windows 7, error 651 windows 8,error 651 windows 10.

1. By Reconfiguring Your Router: 

Properly configure your router by reading router manual carefully. If you have configured it already then just turn off your WiFi router and turn it on after 5-10 minutes. If you are using LAN connection then just unplug the LAN wire and plug it again. It will probably solve error 651.

2. Recreate PPPoE Connection:

For recreating PPPoE Connection follow these steps:

  1. Go To Control Panel > Network and Sharing Center.Error 651 Windows 7
  2. Click on Set up a new connection or network.651 Error
  3. In the connection options choose Connect to the Internet and click Next.
    Connection Failed With Error 651
  4. It will ask if you want to use a connection you already have.
    Select No,create a new connection and click Next.
    Create PPPoE Connection
  5. Select Broadband(PPPoE) and fill the information of your ISP and then Connect.
    Connection Failed With Error 651
    You will get connected to internet.

3. Disable IPv6 of Connection:

To disable IPv6 follow these simple steps.

  • Go To Control Panel > Network and Sharing Center.
    Disable IPv6 Windows
  • Click on your Active Network.Disable IPv6 Windows 7
  • Click on Properties and go to Networking Tab.
    Disable IPv6
  • Uncheck Internet Protocol Version 6 and click OK.

It will probably solve Connection Error 651.

4. Reset  TCP/IP:

Error 651 may occur if your Windows Network Stack is full. To clean this we do not need any external software, we can do it just by using command prompt.

  • Right Click on cmd icon and  select Run as administrator.
  • Type command netsh int ip reset reset.log or copy paste it from here and Press Enter.It will clean your Windows Networking Stack.
  • Restart your PC and hopefully it will solve Error 651.

5. Disable Auto Tuning :

Turning off Auto Tuning may help you to resolve connection error 651. This fix is only for the users who are using routers for their internet connection.

  • Right Click on cmd icon and  select Run as administrator.
  • Type command Netsh interface tcp set global autotuning=disabled and press Enter.
  • Restart your PC and connect to internet.

6. Reinstall LAN Card Drivers:

Make Sure that LAN Card driver is installed. If it is installed then check for the updates and update it to the latest version. If it doesn’t have an update then better uninstall it and install it again.

For Checking Network Adapter :

  • Right Click on Computer.
  • Click on Manage.
  • It will take you to the Computer Management. Select Device Manager from System Tools.
    It will show the drivers of Network Adapter.Reinstall LAN Card Driver

Uninstall and reinstall the driver again.

7. Perform Clean Boot:

The purpose of Clean Boot is to find the root cause of this error.If windows services are having some problems then it can be solved by performing a Clean Boot. If windows services are working fine then this method will work for you.

Here are the steps to perform Clean Boot:

  • Click on Start Button and search for msconfig.exe in Search Programs and files.
  • Click on msconfig  & it will launch System Configuration Window.
  • Now Under General tab Choose Selective startup and Un-heck Load startup items and Click Apply.
    Perform Clean Boot
  • Now head over to Services & tick Hide all Microsoft services.
    Perform Clean Boot Windows
  • Click on Disable all and then click OK to apply the changes.

Now Restart your Computer and Check if you were able to solve Error 651.

8. Boot PC in Safe Mode:

If you are still not able to fix error 651 windows 7, then you can try this method by restarting your computer in safe mode and then try to connect to internet.
Basically in Safe Mode Windows is started with limited set of files and startup programs also do not run in safe mode. Follow these simple steps to start your PC in safe mode.

  • Restart your PC if it is already running.
  • When it is turning on, Tap F8 key till you see the advanced boot option.
  • You can use Up/Down arrow keys to select your option.
  • Select Safe Mode with Networking and then press Enter.
  • Necessary drivers will load and your PC will get started in the safe mode.
  • Now just check if you are able to connect to internet or not.
  • This will probably solve connection error 651 in windows.

So these were the some working solutions to fix error 651 in windows 7,windows 8,windows 8.1 & windows 10. Hope your able to fix your CONNECTION ERROR 651 with the help of this article.



One comment on “Error 651: Fix Connection Error 651 Windows 7/8/8.1/10


Thank you for taking the time to write up this information fix my problem. I was messing around with my settings and I change something. Your information is right to the point .
Thank you


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