VPN failures nearly always come down to one of three things: the network you’re on, your credentials, or a missing or expired certificate. The error message tells us which – so note it down exactly before you start clicking.
Quick checks
- Suspect the network first. Public hotspots in hotels, cafes and trains often block VPN ports outright. Tether off your phone for a minute and try again – if it connects, the hotspot was the problem, not your laptop.
- Changed your password recently? The VPN client is still offering the old one. Update the saved credentials and watch for the account locking if it has retried too many times.
- Restart the VPN client, then the laptop. Half-dead tunnels and stuck sessions survive a simple reconnect; a restart clears them.
- Flush DNS if the client says it can’t find the server: press Start, type cmd, and run
ipconfig /flushdns. If your device can’t resolve the VPN server’s name, it never even gets to the login stage.
Certificate errors
Errors mentioning a certificate – invalid, expired, or not found – aren’t fixable from your end. VPN certificates have an expiry date, and when one lapses, everyone using that profile fails at once. Raise a ticket with the exact wording and we’ll reissue it.
Connected but nothing loads?
If the VPN says connected but internal systems don’t open, that’s usually split-tunnel routing or DNS inside the tunnel – send us the name of one system you can’t reach and we’ll trace it. And if your internet itself is the problem, start with Wi-Fi connected but no internet before blaming the VPN.