VPN Not Working? 10 Proven Fixes to Restore Your Connection

If you’re facing a ‘VPN not working’ issue, you’re not alone. Whether it’s failing to connect, dropping frequently, or slow speeds, VPN glitches can disrupt your browsing, streaming, or privacy. This comprehensive guide covers the most common causes and practical fixes to get your VPN running smoothly again.

We’ll walk you through troubleshooting steps, from basic checks to advanced solutions, tailored for UK users on various devices.

Why Is My VPN Not Working?

VPNs create encrypted tunnels for your internet traffic, but several factors can interrupt this:

• Server overload: Popular servers get congested, especially during peak hours.
• Network conflicts: Firewalls, antivirus, or ISP restrictions block VPN traffic.
• Outdated software: Old VPN apps miss security patches and compatibility updates.
• Protocol mismatches: The wrong VPN protocol (e.g., OpenVPN vs WireGuard) for your network.
• Device settings: IPv6 leaks, DNS issues, or MTU mismatches.

Identifying the root cause is key to a quick fix.

Quick Checks Before Troubleshooting

Start with these simple steps:

• Restart your device and router.
• Toggle your VPN off and on.
• Switch to a different server location (try a UK server if abroad).
• Check for VPN app updates in your app store or provider’s site.
• Verify your subscription is active and not expired.

If these don’t help, dive deeper.

10 Step-by-Step Fixes for VPN Not Working

1. Test Your Internet Connection

A unstable base connection causes VPN failures.

• Run a speed test without VPN (e.g., via speedtest.net).
• Switch Wi-Fi networks or use mobile data.
• Restart your modem/router: unplug for 30 seconds.

2. Change VPN Servers and Protocols

Servers vary in load and performance.

• In the app, select a less crowded server (e.g., avoid London during evenings).
• Switch protocols: Try WireGuard for speed or OpenVPN for reliability.

3. Disable Firewall and Antivirus Temporarily

Security software often flags VPNs.

• Windows: Search ‘Windows Defender Firewall’ > Allow VPN app.
• macOS: System Preferences > Security & Privacy > Firewall > Turn off.
• Third-party antivirus: Add VPN app to exclusions.

Re-enable after testing.

4. Update Your VPN App and OS

Outdated versions cause compatibility issues.

• Download the latest from your provider’s official site.
• Ensure your OS is updated (Windows Update, macOS Software Update).

5. Clear DNS Cache

DNS glitches block connections.

Windows:

• Open Command Prompt as admin.
• Run: ipconfig /flushdns

macOS:

• Terminal: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

6. Check for IPv6 Leaks

Many VPNs are IPv4-only.

• Disable IPv6 in network settings or use VPNs supporting it.
• Test leaks at ipleak.net.

7. Adjust MTU Settings

Packet fragmentation slows or breaks VPNs.

Windows:

• Command Prompt: netsh interface ipv4 set subinterface "Wi-Fi" mtu=1400 store=persistent

Replace “Wi-Fi” with your adapter name.

8. Reinstall the VPN App

Corrupted installs are common.

• Uninstall via Control Panel (Windows) or Applications (macOS).
• Delete leftover files in %AppData% (Windows).
• Re-download and install fresh.

9. Contact Your ISP

UK ISPs like BT or Virgin Media sometimes throttle VPNs.

• Ask about VPN blocks or port restrictions (UDP 1194 for OpenVPN).

10. Switch to a Better VPN

Free or low-quality VPNs often fail. Compare our top VPNs here for reliable UK options with 24/7 support and kill switches.

Platform-Specific Troubleshooting

Windows Fixes

• Run as administrator.
• Disable ‘Fast Startup’ in Power Options.
• Edit adapter settings: Right-click VPN > Properties > Uncheck IPv6.

macOS Fixes

• Reset Network Settings: System Preferences > Network > Advanced > TCP/IP > Renew DHCP.
• Check Little Snitch or similar for blocks.

Android/iOS Fixes

Android:

• Clear app cache: Settings > Apps > VPN > Storage > Clear Cache.
• Enable VPN in battery optimisation exclusions.

iOS:

• Forget Wi-Fi network and reconnect.
• Toggle iCloud Private Relay off.

When to Seek Support

If fixes fail:

• Use live chat with your provider (look for UK-based support).
• Check status pages for outages.
• Take our VPN quiz here to find a more stable service.

Preventing Future VPN Issues

• Choose VPNs with automatic server selection and obfuscated servers.
• Enable kill switch to avoid leaks.
• Regularly update apps.

Reliable VPNs like ExpressVPN or NordVPN rarely have downtime. With these steps, your ‘VPN not working’ woes should be history. Stay secure!