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VPN Error 789: What It Is and How to Fix It

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How to Troubleshoot VPN Error 789 in Windows 10

VPN error 789 is a connectivity error that can occur when trying to connect to a Virtual Private Network or VPN. It means that the VPN client software on your device was unable to establish a secure encrypted connection to the VPN server. This error prevents you from accessing the internet through your VPN.

What is VPN error 789?

VPN error 789 is reported when the VPN handshake process fails for some reason. The handshake is the initial connection between your VPN client and the VPN server that authenticates your login and sets up the encrypted tunnel for private data transfer. If there is an issue during the handshake like incorrect login details or connectivity problems, error 789 will appear on screen.

Why does VPN error 789 appear?

There are several common reasons why VPN error 789 can manifest:

  • Incorrect VPN credentials: The most likely cause of VPN error 789 is entering an incorrect username, password, or other login credentials for your VPN service. Double check that you have the right credentials and try signing in again.
  • Outdated VPN software: If you are using a VPN client app on your Windows device, it may be out of date. VPN services frequently update their apps to patch security issues and fix bugs. Update your VPN app to the latest version and the error 789 should be resolved.
  • VPN server issues: Sometimes VPN services experience temporary issues with their VPN servers that can lead to error 789 for users. The problem is on the VPN provider’s end, not your device or network. You may need to contact your VPN service’s support to report the issue and wait for them to fix it.
  • Internet connectivity problems: Error 789 can also appear if there are internet connectivity issues interfering with the VPN connection. Make sure you have a stable Wi-Fi, Ethernet or cellular data connection, restart your router, modem and any other networking equipment. If possible, try connecting to another network to rule out an issue with your local network.
  • VPN not allowed: Some networks like schools, offices or public Wi-Fi hotspots may block VPN connections. If so, you won’t be able to connect and will see error 789. You may need to contact the network administrator to request VPN access or use another network.
  • Antivirus software interference: Occasionally, antivirus or firewall programs can block VPN connections and trigger error 789. You may need to temporarily disable your antivirus to establish the VPN connection. Be very careful when disabling your antivirus protection.
  • External VPN issues: If you are trying to access a VPN hosted externally by your work or school, there may be an issue with the VPN server or network that is causing connectivity issues and error 789. You will need to contact the external network support team to report and resolve the problem.

How Do I Fix the error 789 VPN on Windows 10?

Here are some steps to fix VPN error 789 on Windows 10:

  • Verify your VPN login details: Please double check that you have the correct login credentials for your VPN service before proceeding to connect. Make sure you have the proper username, password, and any other information required to access your VPN account. Verifying this information ahead of time will help avoid issues logging into your VPN and prevent wasted time troubleshooting incorrect login details.
  • Update your VPN software: If you have a VPN client app installed, check that you have the latest version. Outdated software is a common cause of connectivity errors. Download any available updates and install them.
  • Restart your network equipment: Restart your Wi-Fi router, modem, Ethernet switch or any other networking equipment. Then restart your Windows 10 device as well. This can resolve any temporary connectivity issues leading to error 789.
  • Switch to a different network: If possible, switch to another Wi-Fi or Ethernet network. Public or work networks may sometimes block VPN traffic, leading to error 789. A personal home network is preferable. If using cellular data, you may need to contact your carrier to allow VPN access.
  • Temporarily disable antivirus software: Windows 10 has built-in antivirus in the form of Windows Defender. Third-party antivirus suites can also sometimes interfere with VPN connections. Disable your antivirus temporarily, connect the VPN, then re-enable your antivirus. Be very careful disabling your antivirus software.
  • Contact VPN support: If problems continue, you may need to contact the support team for your VPN service to further diagnose and fix the issue leading to error 789. They should be able to determine if the issue lies with the VPN network or software and resolve it or find an alternative solution for you.
In most cases, checking your VPN login details, updating your VPN software, switching to a more reliable internet connection, or waiting for VPN server issues to be resolved should help in eliminating VPN error 789 on Windows 10.
Riha Mervana
Riha Mervana

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Riha Mervana is a professional content writer at SearchVPN.org, with extensive experience crafting engaging and informative content. She has established herself as an expert in the VPN industry, creating content that educates readers on the importance of online privacy and security.