How can you remove the error from your Windows 7/8/10/11 PC?
Go to this post andMiniTool Solutionshows you some effective ways.
Is ExpressVPN not connecting to internet on your Windows PC, Mac, Android phone, or iPhone?
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Try these fixes if ExpressVPN wont connect or work.
It is one of the most common errors that appear when attempting to connect to an L2TP server.
In Windows 7/8, you get the following computer screen.

How can you get rid of the VPN error 789?
It is not difficult and you’re able to follow the methods below.
In this case, you’re able to reset the VPN online grid adapter.

Step 1: Go to rig Manager on your PC.
Step 2: ExpandNetwork adapters, right-choose the web connection driver, and chooseUninstall machine.
Step 3: ClickUninstall.

Step 4: Restart the PC and Windows will automatically install a driver for the internet.
Then, connect to your VPN to see if the error the L2TP connection attempt failed is removed.
How to update drivers in Windows 11 to fix some errors or improve PC performance?
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This post gives you some efficient methods for driver update.
If the certificate is not correct, you will fail to use the virtual private online grid.
To fix the error, re-enable them.

Step 1: PressWin + R, typeservices.mscto the box and clickOK.
If this service is not running, start it.
If it is running, stop and start it again.
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Step 3: Do the same thing for the IPsec Policy Agent service.
Step 4: ClickApplyandOK.
Or, you could choose toback up registry keysin advance.
Step 2: Go toHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent.
Step 3: Right-hit the empty space on the right side and chooseNew > DWORD (32-bit) Value.
Step 4: Double-click this value and set its value data to2.
What is Atlas VPN?
How to free download Atlas VPN for Windows, macOS, Linux, Android, iOS, etc.?
Go to find details from this post.