How to fix error 651 in Windows 10, 8.1, 7 and get back online

Marian Cularea By: Marian Cularea
5 minute read
fix error 651

Home » How to fix error 651 in Windows 10, 8.1, 7 and get back online

If you are using a wireless connection or a cable internet connection and you upgraded to Windows 8.1 or Windows 10, you might experience some issues regarding the error 651 that basically prevents you from using your internet connection as you should. This error is usually caused by a Registry issue and will prevent the tool from recognizing your Router or Hub device.
error 651 in WIndows 8.1 or Windows 10
You will see that if you are using other devices in order to connect to your Wireless internet connection, they will work. This is mainly an issue affecting your Windows 8.1 or Windows 10 system. You don’t have to worry anymore — in this guide, we will list the steps to follow in order to fix error code 651. This will only take you a couple of minutes of your time. If your connection failed with error 651, follow the instructions listed below.

SOLVED: Error 651 on PC

  1. Enter Safe Boot
  2. Disable all startup services
  3. Rename the rasppoe.sys file
  4. Run the Network Troubleshooter
  5. Reset TCP/IP
  6. Update your network drivers
  7. Disable autotuning

1. Enter Safe Boot

  1. You will need to restart your Windows 8.1 or Windows 10 and log in to your Safe Mode with networking feature in order to apply the following changes.
  2. While in Safe mode you need press and hold the “Windows” button and the “R” button.
  3. A “Run” window will appear.
  4. Write in the “Run” window the following command “MSCONFIG”.
  5. Press the “Enter” button on the keyboard.
  6. Now another window will show and you will need to left click on the “Boot” tab situated in the upper side of that window.
  7. In the topic “Boot options” you need to left click on “Safe boot”.safe boot windows pc
  8. Check the box next to “Network” under the “options” section of the page.
  9. Reboot your Windows 8.1 or Windows 10 device and check if you still have the error 651 appearing in your system.

— RELATED: Full Fix: My internet connection is limited in Windows 10

2. Disable all startup services

  1. Press and hold the “Windows” button and the “R” button.
  2. In the “Run” window that appeared write “MSCONFIG”.
  3. Press the “Enter” button on the keyboard.
  4. Left click on the “Boot” tab.
  5. Uncheck the box next to “Safe mode”.
  6. Left click on the “General” tab.
  7. From the features you have there you need to go to “Selective Startup”
  8. Uncheck the features to clear the selections.
  9. Left click on the “Services” feature and left click again on “Disable all” button.disable startup programs
  10. Left click on the “Startup” tab and disable each item you have in that list.
  11. Reboot your Windows 8.1 or Windows 10 device.
  12. After the device reboots go again to the “MSCONFIG” window as you did above.
  13. Left click on the “Services” tab.
  14. Left click on the “Hide all Microsoft services” feature.hide all microsoft services
  15. Left click on the “OK” button you have on that window.
  16. Reboot your Windows 8.1 or Windows 10 device again.
  17. Check to see if you still have this issue.
  18. If you don’t have this error anymore it means that one of your startup apps is causing the error 651 issue.
  19. If you still have these issues go back to the “MSCONFIG” window.
  20. Left click on the “General” tab.
  21. Left click on “Normal Startup” feature.
  22. Choose to Reboot the Windows 8.1 or Windows 10 device.

— RELATED: Fix: High CPU when browsing the Internet

3. Rename the rasppoe.sys file

  1. When your Windows 8.1 or Windows 10 powers up on the start screen, you need to left click on the “Desktop” icon.
  2. While in your desktop you need to double click on the “My Computer” icon to open it.
  3. Double click on the “C:/” drive to open it.
  4. In the “C:/” drive double click on the “Windows” folder to open it.
  5. In the “Windows” folder find the “System 32” folder and double click on it to open.
  6. In the “System 32” folder double click on the “Drivers” folder to open it.
  7. In the “Drivers” folder you will need to search for the “rasppoe.sys” file.
  8. Rename that file “rasppoe.sys” .
    Note: You can rename the file “rasppoe.sys_backup” so that you will still have it when you are done.rename rasppoe.sys windows 10
  9. Download a new “rasppoe.sys” file from the internet and copy it in that specific folder where you had the old one.
    Note: After you download this file you should unzip the contents and then copy it to your “Drivers” folder.
  10. Reboot the Windows 8.1 or Windows 10 device and see if you still have this issue.
    Note: If you want to put the old “rasppoe.sys” file in the “Drivers” folder you can delete the one you downloaded and rename the old one you saved above. Rename the “rasppoe.sys_backup” file to “rasppoe.sys” and reboot the device.

4. Run the Network Troubleshooter

If your Internet connection remains unavailable, try running the built-in Network troubleshooter. You can launch it from Control Panel or the Settings page (on Windows 10).

  1. Go to Start > type ‘control panel’ > open Control Panel
  2. In the search box, type ‘troubleshoot’ > select Troubleshooting > click on View All to list all the troubleshooting tools
  3. Select and run the following troubleshooters: Incoming connections, Internet Connections and Network Adapter. fix error 651 windows pc
  4. Restart your computer and check your Internet connection.

To run the Internet Troubleshooter on Windows 10, go to Settings > Update & Security > Troubleshooter and select Internet Connections.

fix Internet Connections

5. Reset TCP/IP

If the problem persists, try resetting your TCP/IP. Here are the steps to follow:

  1. Type cmd in the search box > right click on Command Prompt > select Run as administrator
  2. Enter the netsh int ip reset reset.log command > wait for the scanning process to complete
  3. Restart your computer and check your Internet connection

6. Update your network drivers

Outdated network drivers may also trigger error 651. To fix the problem, make sure that you’ve installed the latest network drivers on your machine.

  1. Launch Device Manager > locate your network adapter driver > right click on it
  2. Select the option ‘Update driver‘update network adapter driver
  3. Restart your computer and check your Internet connection.

7. Disable autotuning

AutoTuning is a feature that’s meant to improve the performance of apps and programs relying on TCP. However, in some cases, this tool may do more harm than good and disabling it may help you fix error code 651.

Here are the steps to follow:

  1. Launch Command Prompt as Administrator
  2. Enter the Netsh interface tcp set global autotuning=disabled command > hit Enter > test your connection.

Quick solution to fix various PC errors

  • Step 1: Download this PC Scan & Repair tool
  • Step 2: Click “Start Scan” to find Windows issues that could be causing error 651 in Windows 10
  • Step 3: Click “Start Repair” to fix all issues.

So you now know how to fix your Windows 8.1 or Windows 10 error 651. Please write us below if this article was helpful and if it fixed your error 651 issue in Windows 8.1 and Windows 10.

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Editor’s Note: This post was originally published in October 2015 and has been since updated for freshness, and accuracy.

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