Windows 10: L2TP/IPsec with pre-shared key refuses to connect

I am running Win 10 Home, 10.0.18393 Build 18363. I am trying to connect to my work VPN L2TP/IPsec with pre-shared key. Back in March I was able to connect. I then I switched to my work PC and connected to the same VPN with no issues. Now that I moved my work PC to my office, I am trying to use my personal PC to connect to the VPN and it refuses to. I have done most of the "fixes" out there, i.e. disable Xbox network, regedit adding a line, turned off firewall defender, not using an other, checked ports etc... I feel I have tried them all and it will not connect. I keep getting the same error 809. I am hoping someone can give me some insight since my last resort is to reinstall windows I don't want to do this.

Thank in advance.

:)

 

Problem VPN L2TP/Ipsec Microsoft Win 10 PRO

Hello, I can't get a VPN connection. I am using standard windows 10 VPN. I am using L2TP / IPSEC with pre-shared key. Once the connection works and sometimes not. Where can I view the log? How to diagnose VPN connections.

Please help
Arek

 

windows 10 l2tp/ipsec vpn connection failed

The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer.

kindly send regedit settings for this to connect secure-key l2tp for windows 10

in windows 10 regedit HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\IPSec

ipsec not showng. than we are facing problem to connect give us solution.

 

VPN Issue when connecting to L2TP / IPSec connection

I am facing issue when connecting VPN using L2TP/IPSec with the preshared key since the latest Microsoft update.

Is any way to connect to the VPN? or Microsoft is brining any patch for it?