FortiClient VPN not working on Windows 11




Hasibul Kabir is a Tech-Enthusiast Blogger, Web Developer & Hobbyist Game Developer. He loves writing about Technology, mainly Windows, Mac, and iOS…. Read more


  • For critical reasons FortiClient VPN may not work on Windows 11 even though it works on Windows 10 on the same computer.
  • The most common issue is it fails to establish a connection or repeatably disconnects from the VPN network.
  • Updating the network adapter may help you to get rid of this problem in many cases.
  • Though you also can try to re-install the VPN client with the latest version, you may still need to follow some other methods shown in this article.

Fix FortiClient VPN not working on Windows 11



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If you are looking for a solution to fix Windows 11 Forticlient VPN not working issue, this article will help to troubleshoot this problem.

Forticlient VPN is a very reliable client to access corporate networks from anywhere. Many people around the world depend on it for better flexibility and performance.

However, things go wrong when it doesn’t work correctly. Many users have reported that it worked on their Windows 10 PCs but stopped working on Windows 11 after upgrading. Most of them have experienced that the FortiClient VPN keeps disconnecting repeatedly or fails to establish a connection.

FortiClient VPN not working on Windows 11 screenshot

Don’t worry. You can get rid of this issue if you carefully follow these methods.

How can I fix Windows 11 Forticlient VPN not working?

1. Re-install with the latest version

1.1 Uninstall

  1. Press Win + I on the keyboard to open Windows 11 settings.
  2. Go to Apps.going apps win11 settings
  3. Click on Apps & features.going apps features win11 settings
  4. Look for the Forticlient VPN.
  5. Click on the three vertical dots next to the VPN client and choose Uninstall.uninstalling forticlient vpn win11 settings

1.2 Re-install

  1. Go to the FortiClient VPN download page.
  2. Download the VPN.
  3. Install it on your Windows 11 PC.

2. Change DNS

2.1 Set DNS address

  1. Go to Windows Settings like before.
  2. Click on Ethernet or Wi-Fi, depending on which connection you are using.going ethernet win11 settings
  3. Click on Edit next to the DNS server assignment.going edit dns settings win11
  4. Select Manual.
  5. Enable IPv4 or IPv6, depending on your preference.
  6. Set your preferred DNS address and click on save. In our case, we have used Google DNS:, dns settings win11

2.2 Flush DNS

  1. Open the Start menu.
  2. Type cmd and hit enter to open the Command Prompt.opening command prompt windows 11
  3. Type the following command and press enter. ipconfig /flushdns ipconfig flushdns


After changing the DNS, you can try to connect to your VPN network using FortiClient. Hopefully, it will not disconnect again and work properly on Windows 11.

3. Check proxy settings

  1. Go to Network settings like before.
  2. Click on Proxy.going proxy settings win11
  3. Click on Edit next to the Use a proxy server.clicking setup proxy settings win11
  4. Turn it off.turning off proxy settings win11
  5. Do the same for the Use setup script.

4. Reset network

  1. Go to Network settings.
  2. Click on Advanced network settings.going advanced network settings win11
  3. Next, click on Network reset.clicking network reset win11 settings
  4. Click on Reset now.clicking reset now for network reset win11 settings
  5. Click on Yes.

5. Re-enable ethernet

  1. Navigate to the Network settings again.
  2. Go to the Advanced network settings.
  3. Click on Disable next to the Ethernet connection you are using.disabling ethernet win11
  4. After a few seconds, click on Enable.

6. Use Wi-Fi

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To fix Windows 11 FortiClient VPN not working issue, you should use the Wi-Fi connection rather than Ethernet.

For some reason, on some computers, the error only appears when users try to connect to the VPN network using the Ethernet connection. But, when they try to do the same thing using Wi-Fi, it works surprisingly.

7. Update network driver

  1. Open the Start Menu.
  2. Type device manager and press enter to open Windows Device Manager.opening device manager windows 11
  3. Expand Network Adapters.expand network adapters
  4. Right-click on your network driver and choose Update Driver.choose update driver network driver
  5. Click on Search Automatically for drivers.
  6. Windows 11 will try to find the latest driver and install it automatically.

Now, Try to connect to the VPN network. You should no longer face the FortiClient VPN not working issue on Windows 11.

8. Use SSL-VPN

If FortiClient VPN still does not work on Windows 11, you should change something on your VPN configuration. Instead of IPsec VPN, use SSL VPN. For this, configure every necessary setting on both server-side and client-side.

Configuring FortiClient SSL VPN on Windows 11

According to a significant number of users, this technique is very effective.

9. Change VPN

If you do not need to use a VPN for business purposes and connecting to a corporate network is unnecessary, FortiClient VPN is not mandatory. In this case, you can try any industry-leading VPN services on Windows 11.

Private Internet Access (PIA) is the most recommended VPN service for everyone. This VPN service is an excellent choice for gaming, watching Netflix, Hulu, or doing other things. It can provide you with the best class performance and security.

PIA has apps on different platforms. So, no manual configuration is required. Especially on Windows 11, its VPN client works great.

Private Internet Access

Private Internet Access is a very reliable VPN service with a massive global network that works very well on Windows 11.

These are the most effective way to get rid of the FortiClient VPN not working issue on Windows 11. Feel free to share any other effective methods in the comment box if you know any other effective techniques.

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