How to Fix Connection Failed with Error 651 on Windows?

by Harry M. developer

The majority of global systems require a functional internet connection to work correctly. However, a faulty internet connection can create multiple errors on your PC like, connection failed with error 651. If you are facing the same, then the blog would be of great use to you. So, here are the steps to fix the error.

**Source:-How to Fix Connection Failed with Error 651 on Windows?**

Attempt an Another Connection

The error may occur due to a malfunctioning internet connection. Therefore, attempt a connection to a different internet connection, if possible. In case it does not apply, the issue is with the system; in case it works, then the connection automatically is the culprit.

Reboot the System and Modem

In case you intend to reboot the system and modem, then you can opt to follow the below-mentioned guidelines.

First of all, turn off the system.
Thereafter, switch off the modem and detach the connections from the AC power.
You should detach the cord that is connecting the modem and system.
Then wait for 30 seconds and attach the cords among the system and modem.
You have to attach the modem of the source of power and switch on again.
Now, turn on the system and attempt associating to broadband now and look if you are getting ‘error code 651 connection failed.’

Reset TCP/IP to Solve Connection Failed with Error 651 in Windows

If the users are trying to reset TCP/IP to solve connection failed with error 651 in Windows, then they should carefully apply the given steps.

Navigate to the Start Menu on your system.
After that, input ‘cmd’ into it and hit the Enter key.
You will see a Command Prompt on your screen.
During the Command Prompt, input the ‘netshintip reset reset.log’ command.
Now, reboot the system and look at whether the problem is solved.

Modify the Dial-up Connection

In case you intend to modify the dial-up connection, then you can opt to follow the below-mentioned guidelines.

Go to the Start menu on your system.
After that, input control panel’ into the search section to launch the Control Panel.
Navigate to the Network and Internet tab.
Select the ‘Network & Sharing Center’ option.
Click on the ‘Change Adapter Settings.’
Reach the ‘dial-up connection,’ and right-click on it, then choose the Create copy option.
Finally, you should make a fresh connection, remove the prior one, and begin the fresh connection to look at whether the 651 error has solved.

Turn off IPv6 to Solve Connection Failed with Error 651 on Windows

If the users are trying to turn off IPv6 to solve connection failed with error 651 on Windows, then they should carefully apply the given steps.

Navigate to the Start Menu on the system.
Thereafter, input ‘control panel’ into it and hit the Enter key.
You should click on the ‘Network and Internet’ option.
Go to the ‘Network and Sharing Center’ and then select the Change Adapter Settings.
Reach the active internet connection and right-click on it, then continue with the Properties option.
Finally, choose the ‘Networking’ section and untick the ‘Ipv6 connection’ option.

Turn off Auto-tuning for Windows

In case you intend to turn off auto-tuning for Windows, then you can opt to follow the below-mentioned guidelines.

Reach the Start menu and input ‘cmd’ into it then hit the Enter key.
After opening the Command Prompt and input the command: ‘Netsh interface TCP set global autotuning=disabled.’
Finally, attempt to link to the internet and check if you are getting 651 error.

Clean Boot Option to Solve Connection Failed with Error 651 on Windows

If the users are trying to clean the boot option to solve connection failed with error 651 on Windows, then they should carefully apply the given steps.

Hold the Win + R keys at the same time on your system to launch the Run section.
After that, input ‘msconfig’ into it and hit the Enter key.
Go to the next section and reach the General tab then choose the ‘Selective startup.’
Select the ‘Load startup’ items.
Then move to the Service section and tick the box of “Hide all Microsoft Services.”
Select the ‘Disable all’ option and turn off all other services.
Now, reboot the system to finish the clean boot.
Finally, link to the internet and look at whether the problem is fix.

Install Network Adapter Again

In case you intend to install a network adapter again, then you can opt to follow the below-mentioned guidelines.

Press the Win + R keys at the same on your system to launch the Run section.
After that, input ‘devmgmt.msc’ into it and hit the Enter key.
You should select the ‘Network Adapters’ and spread it out.
Then find the adapter and right-click on it then choose the Uninstall option.
Now, rebooting the system will restore the network adapter and link to the internet and look at whether the error still continues.

Replace the System File

If the users are trying to replace the system file, then they should carefully apply the given steps.

The “Raspppse.sys” system file location on Windows 7 is ‘C:\Windows\System32\Drivers.’
Then change the name of the file as “Raspppse1.sys”.
You should download the file of “Raspppse1.sys” from the internet and copy it in the over-mentioned location.
Reach the folder and unzip it then install the file.
Now, restart the system and check whether the error has been resolved.

Launch Network Troubleshooter

In case you intend to launch the network troubleshooter, then you can opt to follow the below-mentioned guidelines.

Navigate to the Start menu on your system.
After that, input the’ control panel’ into it and hit the Enter key to launch the launch of the Control panel.
Go to the search section and input ‘troubleshoot’ into it then press the Enter key.
Choose the Troubleshooting option.
Click on the ‘View All’ option on the left of the window. This will appear all the tools of troubleshooting.
Click on it and launch the troubleshooters like ‘Network Adapter,’ ‘Incoming connections’ and ‘Internet Connections.’
Now, reboot the system and look at whether the internet is functioning without error.

Harry Martin is a qualified IT engineer by education. After working in the IT sector for a decade, He began writing about it two years ago. He loves to write about emerging technology like mcafee.com/activate.