How to Resolve Error 651 on Windows 10?

The error 651 can come up in Windows Operating Systems due to a problem with the modem. This issue can show up while you attempt to connect via PPPoE (Point to Point Protocol over Ethernet) connection. When this problem pops up, then you will get an error message as follows – “The modem (or other connecting devices) has reported an error”. This can occur due to several reasons. Some of the most common ones are if there is some kind of issue with the network. When the driver software of the network card is obsolete, even then you can encounter this problem. Further, if the TCP/IP is not set correctly, then also there is a chance for you to face this issue. Moreover, when the ‘Auto Tuning’ feature is not enabled, then also you can encounter this error.

Best Solutions to Resolve the Error 651

In this section of the article, you will get to know a few quick methods that will help you resolve error 651 in no time.

Procedure to Update the Network Card Driver Software

When the driver of the network card present within the computer is out of date, then you can face this error. The solution to correct this issue is to update the driver software of the network card. In order to do it, follow the steps below.

  1. First, press the combination the keys ‘Windows + X’ simultaneously. This will launch the ‘Options Menu’.
  2. From that menu, locate the option ‘Device Manager’. This will open the new Device Manager window.
  3. Within this window, you will get all the device and their drivers in a list that were installed on the computer.
  4. Now, from that list, locate and then select the option ‘Network adapters’. After that, double-click on the previous option to reveal the driver software within the expanded list.
  5. Choose the first driver and then right-click on it. Then, from the popup menu that comes up, select the ‘Update Driver Software..’ option. This action opens a new window, where you will see two links. Out of those two options, select the first link ‘Search automatically for updated driver software’. Once you have done this, then automatically the Windows OS will search for any updates available for the device driver within the Microsoft server.
  6. If an update is present, then those will automatically be downloaded and then installed.
  7. Repeat the fifth and sixth steps of this point to update all the other drivers of the device category ‘Network adapters’.
  8. Once all the drivers are updated, restart the computer.

Set the TCP/IP On the Windows PC Once Again

When the TCP/IP is not set in the correct way, then you can encounter this problem. The ‘Transmission Control Protocol/Internet Protocol’ or ‘TCP/IP’ is a protocol that is specifically used for communication within a private network. The TCP is responsible for the creation of all the communication channels via a network by the applications. The IP’s responsibility is to provide an address for every packet of data and make sure that it is sent to an accurate destination. The best way to resolve this problem is to reset the TCP/IP and reconnect the network stack of the Windows. Follow the lines below, in order to do this.

  • First, tap on the ‘Cortana’  logo, this will open the search area. Within that area type the text “command prompt”. After that, from the output of the search, locate the “Command Prompt” option and then right-click on it. Next, from the popup menu that comes up, select the item ‘Run as administrator’. When UAC prompt shows up, then tap on the ‘Yes’ button.
  • Now, a new window will come up with the name ‘Command Prompt’, that has a black background and white text.
  • Inside that window, type the command as follows – “netsh int ip reset reset.log” and then, tap on the ‘Enter’ key to execute.
  • Wait for the above command to fully execute.
  • Once the execution is complete, reboot the computer and see if the error comes back or not.

Deactivate the IPv6 within the Computer

Sometimes the error 651 can crop up if the IPv6 is active on the machine. So, the easiest answer to resolve this glitch is to disable the IPv6 connection. Here are the steps on how can you achieve it is presented.

  • First, go to the ‘Network’ icon present on the right side of the taskbar and right-click on it. Then, from the popup menu that comes up, choose the option ‘Open Network and Sharing Center’.
  • This will open a new window with the name ‘Network and Sharing Center’. Within that window, navigate to the left panel and then select the link ‘Change adapter settings’.
  • Now, another page will show up, which consists of various network connections. From those connections, select the currently active network and right-click on it. After that, from the popup menu, choose the option ‘Properties’.
  • Now, a new window named ‘Properties’ will come up. In it, tap on the tab ‘Networking’. Under that tab, locate the option ‘Internet Protocol Version 6 (TCP /IPv6)’ and uncheck it. Then, select the button ‘OK’ to confirm the change in settings
  • Finally, again connect to the network that was active before and then examines if the problem reappears or not.

Create a New Network Connection

When the above methods cannot rectify the “connection failed with error 651”, then the best answer to resolve it is to make a new network connection. Follow the steps beneath to do it.

  • First, go to the ‘Network’ icon present on the right side of the taskbar and right-click on it. Then, from the popup menu that comes up, choose the option ‘Open Network and Sharing Center’.
  • Inside that window, go to the section ‘Change your networking settings’. Under that section, select the link ‘Set up a new connection or network’. This will again launch a new window that has a similar name, with various options.
  • From those options, select the first one that says ‘Connect to the Internet’, then tap on the button ‘Next’.
  • After that, on the next page of that window, go to the bottom and then, choose the link ‘Set up a new connection anyway’.
  • Once you see the heading ‘How do you want to connect?’, then tap on the option ‘Broadband (PPPoE)’.  On the next window, write the ‘User name:’ and the ‘Password:’ presented by the ISP, then click on the ‘Connect’ button.

Start the Modem Device Once Again

If you do not receive any network connection, then you can get the error 651. The method to correct this issue is to restart the modem and check the network.

  • First, press the ‘Power’ button on the back of the modem and turn it off, and after that, shut down the computer also.
  • Remove the power cables of both the computer and the modem from the wall socket. Also, take out the Ethernet cable from the modem and the PC.
  • After that, wait for sixty seconds and then put back all the cables on their respective places in a correct way i.e modem and computer.
  • Then, switch both the devices on, first the modem and then the computer.
  • At last, inspect whether you can see get the network connection or not.

In Conclusion

You can easily eradicate the error 651 if you follow all the methods provided in this post carefully. But, if even after following all the fixes, you still cannot eliminate this glitch, then do not panic. Just, provide all the details of the problem that you have faced on the comment section present below and we will get back to you.