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NordVPN / ExpressVPN Kill Switch Not Working – Complete Fix Guide (2026)

Table of Contents

Hub: Windows 11 Troubleshooting Hub

Quick Answer
NordVPN / ExpressVPN Kill Switch Not Working is a common issue where the kill switch feature fails to block internet traffic when the VPN disconnects. To fix it, toggle the kill switch off and on, change the VPN protocol, temporarily disable third-party antivirus and firewall, restart the VPN service, or run the VPN app as administrator. If the error persists, reset network settings, reinstall the VPN app, or manually add apps to the kill switch list. For more Windows troubleshooting, visit our Windows 11 Troubleshooting Hub.

Why NordVPN / ExpressVPN Kill Switch Not Working Happens

NordVPN / ExpressVPN Kill Switch Not Working is a VPN issue where the kill switch feature fails to block internet traffic when the VPN connection drops. This can expose your real IP address and compromise your privacy. For official documentation, refer to the NordVPN Support and ExpressVPN Support.

The kill switch is a critical privacy feature that prevents data leaks by cutting off internet access when the VPN disconnects unexpectedly[reference:0]. When NordVPN / ExpressVPN Kill Switch Not Working occurs, traffic may continue flowing outside the VPN tunnel, defeating the purpose of using a VPN[reference:1]. Common triggers include VPN protocol conflicts, third-party firewall interference, corrupted VPN service, missing updates, split tunneling conflicts, and DNS or IPv6 leaks[reference:2][reference:3][reference:4].

Before diving into fixes, check if you are connected to the internet without the VPN active. If so, your kill switch is not functioning properly[reference:5]. For a broader overview of VPN issues, see our Windows 11 Troubleshooting Hub.

⚠️ Warning: A malfunctioning kill switch can expose your real IP address. Do not rely on the VPN for privacy until NordVPN / ExpressVPN Kill Switch Not Working is resolved.

1. Toggle Kill Switch Off and On

The simplest fix for NordVPN / ExpressVPN Kill Switch Not Working is toggling the kill switch off and on. This refreshes the feature and often resolves temporary glitches.

  1. Open your VPN app (NordVPN or ExpressVPN).
  2. Navigate to Settings.
  3. Find the Kill Switch or Network Lock option.
  4. Turn it off and wait a few seconds.
  5. Turn it back on.
  6. Restart your VPN connection and test.

✅ Expected Result: Toggling the kill switch often resolves NordVPN / ExpressVPN Kill Switch Not Working immediately. If not, proceed to the next method.

2. Change VPN Protocol

VPN protocol conflicts can cause NordVPN / ExpressVPN Kill Switch Not Working. Switching protocols can resolve compatibility issues[reference:6][reference:7].

  1. Open your VPN app settings.
  2. Find the Protocol or VPN Protocol option.
  3. NordVPN: Go to Settings > Auto-connect > VPN protocol. Try NordLynx, OpenVPN (UDP), or OpenVPN (TCP)[reference:8].
  4. ExpressVPN: Go to Settings > Protocol. Try Lightway, OpenVPN, or IKEv2[reference:9].
  5. Save changes and restart your VPN connection.
  6. Test the kill switch by disconnecting the VPN.

💡 Quick Tip: OpenVPN (TCP) is often more stable with firewalls. NordLynx (NordVPN) and Lightway (ExpressVPN) are optimized for speed[reference:10].

3. Disable Conflicting Software

Third-party antivirus and firewall software can interfere with the kill switch and cause NordVPN / ExpressVPN Kill Switch Not Working. Temporarily disabling them can help identify the cause[reference:11][reference:12].

  1. Open your antivirus or firewall application.
  2. Turn off real-time protection or firewall temporarily.
  3. Test the kill switch by disconnecting the VPN.
  4. If it works, add an exception for your VPN in the security software.
  5. If using Windows Defender Firewall, ensure your VPN is allowed through the firewall[reference:13].
  6. Re-enable your security software after testing.

⚠️ Warning: Only disable security software temporarily for testing. Re-enable it immediately to maintain system security.

4. Restart VPN Service

The VPN background service may become stuck and cause NordVPN / ExpressVPN Kill Switch Not Working. Restarting the service can resolve it[reference:14].

  1. Press Win + R, type services.msc, and press Enter.
  2. Locate your VPN service:
    • ExpressVPN: ExpressVPN Service[reference:15]
    • NordVPN: NordVPN Service
  3. Right-click the service and select Restart.
  4. If Restart is unavailable, select Stop, wait a few seconds, then select Start.
  5. Restart your VPN app and test the kill switch.

✅ Expected Result: Restarting the VPN service often resolves NordVPN / ExpressVPN Kill Switch Not Working caused by service glitches.

5. Run VPN App as Administrator

Permission issues can prevent the kill switch from working properly. Running the VPN app as administrator can resolve NordVPN / ExpressVPN Kill Switch Not Working[reference:16].

  1. Right-click your VPN app shortcut.
  2. Select Run as administrator.
  3. If prompted by User Account Control, click Yes.
  4. To set this permanently:
    1. Right-click the shortcut and select Properties.
    2. Go to the Compatibility tab.
    3. Check “Run this program as an administrator”.
    4. Click OK.
  5. Restart the VPN and test the kill switch.

💡 Quick Tip: Running as administrator grants the VPN app the necessary permissions to modify network settings.

6. Manually Add Apps to Kill Switch

If the kill switch is not blocking specific apps, you can manually add them to the kill switch list. This is a known fix for NordVPN / ExpressVPN Kill Switch Not Working[reference:17].

  1. Open your VPN app settings.
  2. Find the Kill Switch or App Kill Switch section.
  3. NordVPN: Click “Add apps” under App Kill Switch and browse for the app’s .exe file[reference:18].
  4. ExpressVPN: Go to Settings > General and configure Network Lock settings.
  5. Add the executable files of applications you want to block.
  6. Save changes and test the kill switch.

🔁 Alternative Solution: If the kill switch still doesn’t work, try disabling split tunneling, as it can conflict with the kill switch[reference:19].

7. Reset Network Settings

Network adapter issues can cause NordVPN / ExpressVPN Kill Switch Not Working. Resetting network settings can restore functionality[reference:20][reference:21].

  1. Open Command Prompt as Administrator.
  2. Run the following commands in sequence:
    ipconfig /flushdns
netsh winsock reset
netsh int ip reset
  3. Restart your PC.
  4. Alternatively, use your VPN app’s diagnostic tool:
    • NordVPN: Click the question mark icon > Run diagnostics > Reset network[reference:22].
    • ExpressVPN: Use the built-in diagnostic tool in the app.
  5. Restart the VPN and test the kill switch.

✅ Expected Result: Resetting network settings often resolves persistent NordVPN / ExpressVPN Kill Switch Not Working issues.

8. Reinstall VPN App

If the error persists, reinstalling the VPN app can resolve NordVPN / ExpressVPN Kill Switch Not Working caused by corrupted files[reference:23][reference:24].

  1. Uninstall the VPN app from Settings > Apps > Installed apps.
  2. Restart your PC.
  3. Download the latest version from the official website:
  4. Install the VPN app.
  5. Enable the kill switch and test.

🔁 Alternative Solution: Before reinstalling, use a tool like Revo Uninstaller to remove all leftover files and registry entries.

9. Advanced Troubleshooting

If the error persists, try these advanced solutions.

Check for Malware

Malware can interfere with VPN functionality. Run a full scan with Windows Defender Offline. For detailed steps, see How to Scan Malware Windows 11.

Disable IPv6

IPv6 can bypass the VPN tunnel. Open Control Panel > Network and Sharing Center > Change adapter settings, right-click your connection, select Properties, uncheck Internet Protocol Version 6 (TCP/IPv6), and restart.

Check DNS Settings

DNS leaks can occur when the kill switch fails. Ensure DNS is set to your VPN provider’s DNS servers. For NordVPN, go to Settings > Advanced > DNS and select “Use NordVPN DNS”[reference:25]. For ExpressVPN, use the default DNS settings.

Check Split Tunneling Conflicts

Split tunneling can prevent the kill switch from blocking all traffic. Disable split tunneling temporarily to test[reference:26].

Use the VPN CLI

If the GUI app fails, try using the command-line interface:

  • NordVPN CLI: nordvpn set killswitch on[reference:27]
  • ExpressVPN CLI: Use the expressvpn command[reference:28]

Check Network Adapter Power Settings

Windows power management can disable the VPN adapter. Open Device Manager, expand Network adapters, right-click your VPN adapter (TAP-NordVPN or NordLynx), select Properties > Power Management, and uncheck “Allow the computer to turn off this device to save power”[reference:29].

Perform a System Restore

If the error started after a system change, use System Restore to revert. See How to Use System Restore Windows 11.

For more Windows troubleshooting, explore our Windows 11 Troubleshooting Hub.

Conclusion

NordVPN / ExpressVPN Kill Switch Not Working is a critical privacy issue that can be fixed by toggling the kill switch, changing the VPN protocol, disabling conflicting software, restarting the VPN service, running the app as administrator, manually adding apps, resetting network settings, or reinstalling the VPN app. If the error persists, perform advanced troubleshooting like disabling IPv6, checking DNS settings, or using the VPN CLI.

Regular system maintenance, such as keeping your VPN updated and periodically checking network settings, can prevent NordVPN / ExpressVPN Kill Switch Not Working from recurring. For more Windows and VPN troubleshooting, explore our Windows 11 Troubleshooting Hub and check out related articles on Windows 11 No Internet Secured Wi-Fi Error, DNS Server Not Responding, and Default Gateway Is Not Available.

Related Guides

FAQ

Why is my NordVPN / ExpressVPN Kill Switch not working?

NordVPN / ExpressVPN Kill Switch Not Working is caused by VPN protocol conflicts, third-party firewall interference, corrupted VPN service, split tunneling conflicts, or DNS/IPv6 leaks.

How do I fix NordVPN / ExpressVPN Kill Switch Not Working?

Toggle the kill switch off and on, change the VPN protocol, temporarily disable antivirus and firewall, restart the VPN service, run the VPN app as administrator, reset network settings, or reinstall the VPN app.

Can third-party antivirus cause kill switch issues?

Yes, third-party antivirus and firewall software can interfere with the kill switch. Temporarily disabling them can help identify the cause[reference:30].

Does changing VPN protocol fix kill switch issues?

Yes, switching protocols like NordLynx, OpenVPN, Lightway, or IKEv2 can resolve compatibility issues causing NordVPN / ExpressVPN Kill Switch Not Working[reference:31].

How do I manually add apps to the kill switch?

In NordVPN, go to Settings > Kill Switch > Add apps and browse for the app’s .exe file. In ExpressVPN, configure Network Lock settings[reference:32].

Can split tunneling cause kill switch issues?

Yes, split tunneling can conflict with the kill switch. Disable split tunneling temporarily to test[reference:33].

How do I reset network settings for VPN issues?

Open Command Prompt as Administrator and run ipconfig /flushdns, netsh winsock reset, and netsh int ip reset, then restart[reference:34].

Should I run my VPN app as administrator?

Yes, running the VPN app as administrator grants necessary permissions to modify network settings and can fix NordVPN / ExpressVPN Kill Switch Not Working[reference:35].

What should I do if the error persists after all fixes?

If the error persists, check for malware, disable IPv6, check DNS settings, use the VPN CLI, or perform a System Restore.

Is NordVPN / ExpressVPN Kill Switch Not Working a hardware or software issue?

It is primarily a software issue caused by configuration conflicts, drivers, or firewall settings. Hardware issues are rarely the cause.

HowToFixPro Editorial Team

We’re a team of system administrators, technical writers, and platform specialists who genuinely enjoy solving the problems most users find frustrating. From persistent Windows errors and Android sync failures to browser crashes and network drops — we’ve seen it all, and we document every fix properly. Our guides are built on official documentation, direct testing, and real troubleshooting experience. No filler, no guesswork — just reliable, step-by-step solutions you can trust.

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