Windows 10 cannot install KB5010793 patch

Question

My Windows 10 and Windows 11 cannot connect to L2TP VPN, the error code is 788. I learned that Microsoft has released two patches for this problem, Windows 10 needs to use KB5010793, Windows 11 needs to use KB5010795, but when I downloaded the msu file to install it manually, it told me that it could not be installed. I tried to unzip the msu file, install the SSU cab file first, and then install the KB patch cab file. When installing the SSU, it went very smoothly, but when I was about to install the KB patch cab file, it gave an error.

I don't know what I should do to solve this problem！

Answer 1

Hello

It sounds like you're having a tough time with these updates and VPN connections. Let's break down the issues and possible solutions.

 

For Windows 10 KB5010793 Patch Installation Error:

 

Install the Update from Microsoft Update Catalog:

Open your browser and navigate to the Update Catalog.

Type “KB5010793” in the search box and click Search.

Download the update on your computer.

Go to the download folder and open the .MSU file. Follow the instructions to update on your computer.

 

Run Windows Update Troubleshooter:

Click the Search icon on the taskbar and input “settings”.

Open Settings and go to Update & Security.

Select Troubleshoot from the left column and click Additional troubleshooters.

Select Windows Update and click Run the troubleshooter. Restart your computer and try to update the patch again.

 

Run System File Checker (SFC):

Open Command Prompt as an administrator.

Input sfc /scannow and press enter.

After the SFC is finished, restart your computer and update again.

 

Reset Windows Update Components:

Open Powershell with Admin or CMD with Admin.

Run the following commands one by one:

net stop bits

net stop wuauserv

net stop appidsvc

net stop cryptsvc

Restart your computer and try to install the update again.

 

For Windows 11 L2TP VPN Error Code 788:

 

Check Firewall Settings:

Ensure that the Windows Firewall or any other third-party firewall isn't blocking the VPN connection. Temporarily disable the firewall and try connecting again.

 

Modify Registry Settings:

Open the Run box (Win + R), type regedit, and press Enter.

Navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Rasman\Parameters.

Change the value of AllowL2TPweakcrypto to 1.

Restart your computer.

 

Enable Routing and Remote Access Service:

Open Services (Win + R, type services.msc).

Find and enable the "Routing and Remote Access" service.

Start the service manually.

 

Uninstall Recent Updates:

Go to Settings, Update and Security, View Update History, and Uninstall Updates.

Find and uninstall the security update KB5009543.

Restart the computer and try to connect to the VPN again.