Error 651 is a common Windows error that occurs when Windows fails to connect other computers over the internet. Now you might ask the factors that lead to this error.
Users encounter this error when they try to establish the connection through Point to Point Protocol. The problem mainly occurs due to an incorrect Internet or IP configuration.
Though it’s difficult to identify the actual cause of this problem, you can try out the solutions mentioned in this article to get it fixed.
Solutions to Fix Connection Failed with Error 651
We have discussed some of the proven ways to solve this concerning issues.
Solution 1: Restart Both the PC and Modem
The problem might be solved by a simple restart so, why not try it once.
- Turn off the computer and unplug it from the power outlet.
- Then, remove the modem and wait for 30 seconds at least.
- Connect back modem to your PC and plug the power cord to the wall outlet.
- Turn on the PC and try to connect using the Point to Point Protocol.
Solution 2: Update the Network Card Driver
- Click the Start menu, type ‘devmgmt.msc’ into the search bar and press ‘Enter.’
- Click ‘Network Adapters’ on the Device Manager window.
- Locate Network Card among the list of devices installed on your PC.
- The Network Card Driver lacks an updated driver if it has a yellow-colored icon next to it.
- So, right-click on the device and select ‘Update Driver Software’ from the drop-down menu.
- Then, click ‘Let Windows search automatically for the latest driver.’
- Wait until Windows finds the latest driver and install it on your PC.
- If Windows is unable to find the latest driver, then browse your computer for a compatible driver and install it for Network Card Adapter.
Solution 3: Reset the Network and Sharing Center Settings
Make sure that the network and haring center settings are correctly set on your PC. To check the settings you will need to follow the two methods mentioned below:
1. Disable IPV6 for Your Internet Connection
- Right-click the internet icon at the bottom right corner on the taskbar and select ‘Open Network and Sharing Center.’
- Click the ‘Change Adapter Settings’ link and select the network connection you are using.
- Right-click on it and select ‘Properties’ from the context menu.
- Then, uncheck the ‘Internet Protocol Version 6 (TCP/IPV6) box’ and tap the ‘OK’ button.
- After saving the changes, reconnect your PC to the network and see whether the problem is solved or not.
2. Create a New Dial-Up Connection
This process will let you know whether the modem is set to the bridged mode or not.
Already Created a Network Connection
We have mentioned the steps for creating a new dial-up connection for connecting to the particular network.
- Right-click the Internet icon on the Taskbar and select ‘Open Network and Sharing Center.’
- Click on the ‘Change adapter settings’ link, right-click on the dial-up connection and select the ‘Create Copy’ option.
- Then, right-click on the original dial-up connection and select ‘Delete’ from the drop-down menu.
- Check whether you can connect properly to the network or not.
Connecting to the Network for the First Time
Follow the steps given below if you are connecting to the network for the first time.
- Locate the internet icon on the taskbar, right-click on it and select ‘Open Network and Sharing Center.’
- Click the ‘Set up a new connection or network’ link and a new wizard appears.
- Then, tap ‘Connect to the internet’ on the wizard and click the ‘Next’ button.
- Now, ensure that the connection has been established properly.
3. Set up a New Connection Anyway
This method will help those users who are unable to set up the connection by any of the above methods. If you are one of those users, then select Broadband(PPPoE) to access the login page. Then enter the username and password provided by your Internet Service Provider and click the ‘Connect’ button to create the connection.
Solution 4: Reset TCP/IP on Your Windows PC
TCP/IP is a communication protocol for processing internet connection in a private network. TCP defines how programs create communication channels through a network.
Whereas, IP is responsible for sending addresses to correct destinations. Thus, you can reset the TCP/IP for reconnecting to Windows network stack.
- Click the Start menu, type ‘cmd’ into the Windows search bar and hit ‘Enter.’
- Right-click on ‘Command Prompt’ from the search result and select ‘Run as administrator.’
- Click ‘Yes’ on the popup wizard to confirm this action.
- Then, copy and paste the ‘netsh int ip reset reset.log’ into the elevated Command and press ‘Enter’ to execute it.
- Restart the system and try to reconnect the network connection.
- Move to the next solution if you encounter the connection failed error 651 again.
Solution 5: Turn off the Auto Tuning Feature
Windows use its auto-tuning feature to monitor routing conditions continuously. This feature is generally activated on computers.
In case the feature is turned off, Windows will fail to monitor the bandwidth and network delay. So, try out this method if you are using a router for accessing the internet.
- Go to the Start menu, type ‘cmd’ into the search box and hit ‘Enter’ on the keyboard.
- Right-click on Command Prompt appearing in search results and select ‘Run as administrator.’
- Click ‘OK’ on the confirmation dialog box and continue with the next step.
- Copy and paste ‘Netsh interface TCP set global autotuning=disabled’ command into the Command Prompt windows and press ‘Enter.’
- Now see whether the internet connection works properly or not.
Hope, these solutions will help you to resolve the connection error 651 withing a few minutes. Alternatively, connect with your service provider if the problems keeps on bothering you.