In my experience, fixing Windows connection error 651 can be frustrating. Here are 6 ways to resolve this issue.

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Introduction to Error 651

Error 651 is a common Windows connection error that can occur when attempting to establish a connection to the internet. This error is often caused by a problem with the network adapter or modem settings.

To resolve Error 651, try the following steps:

1. Restart your computer and modem to refresh the connection.
2. Check the network cables and ensure they are securely connected.
3. Update the network adapter drivers to the latest version.
4. Disable IPv6 in the network settings.
5. Run a virus scan to check for any malware that may be causing the error.
6. Reset the TCP/IP stack by entering “netsh int ip reset” in the command prompt.

Common Causes and Solutions

  • Unplug the power cable from your modem and router.
  • Wait for 5-10 minutes.
  • Plug the power cable back in and wait for the devices to fully restart.

2. Run Network Troubleshooter

  • Press Windows key + I to open the Settings menu.
  • Click on Update & Security.
  • Go to the Troubleshoot tab and select Internet Connections.
  • Follow the on-screen instructions to run the troubleshooter.

3. Update Network Adapter Driver

  • Open Device Manager by pressing Windows key + X and selecting it from the menu.
  • Expand the Network adapters section.
  • Right-click on your network adapter and select Update driver.
  • Choose Search automatically for updated driver software.
  • Follow the on-screen instructions to complete the update process.

4. Disable IPv6

  • Open Network and Sharing Center by clicking on the network icon in the taskbar and selecting it.
  • Click on your connection and then click Properties.
  • Uncheck the box next to Internet Protocol Version 6 (TCP/IPv6).
  • Click OK to save the changes.

5. Reset TCP/IP Stack

  • Open Command Prompt as an administrator by pressing Windows key + X and selecting it from the menu.
  • Type netsh int ip reset and press Enter.
  • Restart your computer to apply the changes.

6. Contact Your Internet Service Provider

  • If none of the above steps work, contact your ISP to check for any network issues on their end.

Updating Network Adapter Drivers

To update your network adapter drivers, follow these steps:

1. Open Device Manager by pressing Windows key + X and selecting Device Manager from the menu.

2. Locate the Network adapters section, right-click on your network adapter, and select Update driver.

3. Choose the option to search automatically for updated driver software.

4. Follow the on-screen instructions to complete the driver update process.

5. Restart your computer to apply the changes.

By updating your network adapter drivers, you may be able to resolve the Windows connection error 651.

Resetting TCP/IP Stack

To reset the TCP/IP stack on your Windows system, follow these steps:

1. Open Command Prompt as an administrator by searching for “cmd” in the Windows search bar and selecting “Run as administrator.”

2. In the Command Prompt window, type the following command and press Enter:
“`
netsh int ip reset
“`

3. Wait for the command to execute and then restart your computer to apply the changes.

4. After restarting, check if the connection error 651 has been resolved.

FAQ

How to fix error code 651?

To fix error code 651, you can troubleshoot by checking the connection on another device, trying a different connection, ensuring cables are secure, rebooting the modem and router, restarting the computer, running the Internet Connections Troubleshooter, checking for Windows updates, and updating the network adapter driver.

How do I fix Windows Cannot connect to the Internet?

To fix “Windows Cannot connect to the Internet”, you can reset network settings. Go to Settings > Network & Internet > Status, then click on ‘Network reset’. This will reinstall all network adapters and reset networking components to their original settings.

What is the 651 status code?

The 651 status code occurs when attempting to establish a VPN connection after a dial-up connection using ISDN, resulting in an error message stating “Error 651: Your modem (or other connecting device) has reported an error.”

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