- Download and install the software.
- It will scan your computer for problems.
- The tool will then fix the issues that were found.
With regard to personal computer use, there isn’t any reason not to use Windows. It has everything you need, including an easy-to-use interface, and its performance is good enough for everyday tasks. However, when it comes to troubleshooting issues, it’s often hard to figure out precisely what went wrong without having access to the source code.
These cryptic notifications are errors like “Windows cannot connect to the server” or Error 651. These errors may occur when trying to establish a local area network (LAN) connection. What causes them, and how can they be fixed?
Table of Contents:
What are the reasons for connection error 651 to occur?
Error 651 is triggered when the connection to the internet fails. This error can occur due to a number of reasons, such as a faulty cable, poor connectivity, or a damaged router. If you’re experiencing this issue, it’s essential to check whether the device is functioning correctly. You can try restarting the machine, unplugging the devices, and plugging them back in again. Another thing you can do is reset the modem/router manually. Resetting the modem/router might fix the issue.
How to troubleshoot connection error 651?
Launch the network troubleshooter
Suppose you are facing any kind of network issue on your Windows computer. In that case, running the Network troubleshooter built into Windows 10 is an excellent place to begin the troubleshooting process. This troubleshooter can detect and resolve common problems, such as slow internet speed, Wi-Fi connectivity issues, and DNS errors.
To run the Network troubleshooter, follow these steps:
1. Open the Start menu and type Control Panel in the Search field. ClickControl Panel.
2. In the next window, type Troubleshooting in the search bar at the top-right corner and select troubleshooting.
3. A list of possible solutions will be displayed. Select the solution that best suits your needs.
4. After selecting the appropriate solution, clickApply.
5. Restart your device.
Updated: April 2025
This tool is highly recommended to help you fix your error. Plus, this tool offers protection against file loss, malware, and hardware failures, and optimizes your device for maximum performance. If you already have a problem with your computer, this software can help you fix it and prevent other problems from recurring:
- Step 1 : Install the PC Repair and Optimizer Tool. (Windows 10, 8, 7, XP, Vista).
- Step 2 : Click Start Scan to determine what problems you are experiencing with your computer.
- Step 3 : Click Repair Allto resolve all problems.
Reset the network configuration of Windows
Resetting Windows’ network configuration will reset all connection information and revert it to its original state, allowing you to connect to different servers without having to enter credentials each time manually. You’ll lose all data stored on those devices, so make sure you’ve backed up everything before doing this. If you don’t want to lose anything, you can use the following instructions to set up a local account.
1. Open Command Prompt
2. Type “net config /renew”
3. Press Enter
4. Wait for the command prompt window to close
5. Restart your computer
Install the latest network drivers
Windows 10 includes networking software called Device Manager. You can use it to diagnose problems with your computer’s hardware and software, such as devices like printers, modems, routers, and cameras. If you encounter an issue while working with these items, try updating your network driver.
To do this, follow these steps:
1. Open the Start menu.
2. Click the Settings button.
3. In the left pane, select Download updates automatically.
4. Select the option to download recommended updates.
Ensure that network adapter drivers are reinstalled
If you’re having problems connecting to the internet, it could be because your network adapters aren’t working correctly. This sometimes happens when you install new hardware or software. If you’ve just upgraded to Windows 10, there’s a good chance that your network adapters weren’t automatically detected. You might want to try reinstalling the driver manually.
The best way to do this is to open Device Manager. To find out where to look, type devmgmt.msc into the Start menu Search bar. Click on the device category that contains your network adapters, such as Ethernet adapters. Right-click on each one and select Update Driver Software. Select Browse my computer for driver software and browse to the folder containing the drivers for your operating system. Select the appropriate file and follow the prompts. Reboot and see if the problem persists.
Windows TCP/IP needs to be reset
TCP/IP is the short form for Transmission Control Protocol/Internet Protocol, and is used as the communication protocol in private networks. They are responsible for different components when processing the internet connection. TCP defines how the programs could create the communication channels via a network, while IP makes sure that every packet is delivered to the proper destination.
To resolve connection error 651, you can also attempt to reset TCP/IP in order to reconnect to the windows network stack.
1. Type cmd in the Search box of the Taskbar.
2. Right Click Command prompt (if you are using Windows 7, right-click cmd) to run as Administrator.
3. In the command window type ipconfig /release.
4. Restart the computer.
5. If the problem persists, please contact our technical support team.
Disable IPv6
Another fix that worked for users is disabling IPv6 in the Wi-Fi properties. This internet protocol version is no longer required for many connections, so disabling it won’t affect the connectivity performance of the device.
Here is how you can do it:
1. Locate the Network icon on the taskbar, and right-click on the same.
2. Choose Network & Internet Settings.
3. In the next window, click on Advanced Network Settings.
4. In the following window, choose Protocol Version.
5. Select the option that says Use the latest version of TCP/IP.
6. Disable the IPv6 feature.
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Frequently Asked Questions
What should I do if I receive connection error 651?
- Restart your modem and router.
- Reboot your computer.
- Run the Internet connection troubleshooter.
- Check for Windows updates.
- Update your network card driver.
Why does Internet connection error 651 occur?
Connection error 651 indicates that the connection between your PC and your DSL router or DLAN adapter has been disconnected.
What does WAN Miniport PPPoE error 651 mean?
When you try to connect to the Internet via PPPoE connections in Windows 7, you may encounter the dreaded "Error 651: The modem (or other connection devices) has reported an error" message.