If you are facing Error 651 while trying to establish an internet connection using PPPoE connections in Windows, don’t worry. Here are some solutions that can help you fix the problem.
Fix 1: Restart Networking Devices
The first fix is to restart all networking devices. Right-click on the network icon and go to Network and Sharing Center. Click on Change Adapter Settings. Right-click on your connection and select Disable. After disabling it, right-click again and select Enable. This should solve the problem in most cases.
Fix 2: Disable IPV6
If Fix 1 doesn’t work for you, try disabling IPV6. Go to Network and Sharing Center and click on Change Adapter Setting. Right-click on your established connection and click on Properties. Uncheck the IPV6 box and click on OK.
Fix 3: Clean Windows Networking Stack
To clean the Windows networking stack, open Command Prompt with administrator privileges and type the following command: “netsh winsock reset”. Press Enter and restart your PC.
Fix 4: Disable Auto Tuning
To disable auto-tuning, again open Command Prompt with administrator privileges and type the following command: “netsh int tcp set global autotuninglevel=disabled”. Press Enter and restart your PC.
Fix 5: Perform Clean Boot
Another solution is to perform a clean boot. Search for “msconfig.exe” and press Enter. Select the Selective Startup and disable load startup items. Press Apply. Now, go to the Services tab and check the button of Hide all Microsoft services. Click on the Disable all button and press Apply and OK. Restart your PC.
These are the most accurate solutions to fix Error 651. If you want more solutions, you can visit the website trickstable.com.