L2TP VPN doesn't work on Windows 10, but it works perfectly on Windows 11. What should I do?

Zyxel_Cooldia

Question

My L2TP VPN on Nebula doesn't work on Windows 10, but it works perfectly on Windows 11. What should I do?

Answer

It looks like the issue you're experiencing is related to specific Windows updates on Windows 10. The patches KB5036893 and KB5036892 have been reported to break VPN connections. To resolve this issue, uninstalling these updates is recommended.

To remove these updates, follow these steps:

1. Open the Control Panel.
   
2. Go to 'Programs' and then 'Programs and Features'.
   
3. Select 'View installed updates' on the left panel.
   
4. Find updates KB5036893 and KB5036892.
   
5. Right-click each update and select 'Uninstall'.
   
6. Restart your computer after uninstalling both updates.
   

After removing these updates, your L2TP VPN should work correctly on Windows 10.