How to fix 0xc0000135 error on Windows 11 (solve KB5013943 update issues)

What is the 0xc0000135 error and why do I get it?

According to Microsoft official documentation, the 0xc0000135 error code is related to .Net Framework issues. It seems that many applications that require .Net Framework 3.5 to work are not working with the latest Windows 11 update.

This is what causes the 0xc0000135 error code and you can resolve this issue by enabling .Net Framework 3.5 on your PC.

Most modern applications rely on .Net Framework .dll files to run as expected in the background. However, applications are .Net Framework version specific, meaning that applications requiring v3.5 will not work with v4.0, and vice versa.

So, you can fix this error code by enabling or installing .Net Framework 3.5 on your Windows 11 PC.

Besides this, the issue may also be caused by leftover cache files from previous updates or outdated drivers that are currently incompatible with the latest Windows 11 updates. Use the following tutorial to help you fix this error on your PC.

How to fix 0xc0000135 error code on Windows 11

As mentioned above, you can fix this error code mainly by enabling/installing .Net Framework 3.5 on your PC. However, if this fix doesn’t work for you, then you can try one of the other fixes mentioned in this tutorial. let's start.

Fix 1: Enable .Net Framework 3.5

While ideally, .Net Framework 3.5 will be installed on your PC, there are some subsequent features that need to be manually enabled based on user preference. Enabling these sub-features should help you resolve the 0xc0000135 error code on your PC. Follow any of the methods below to get started.

Method 1: Using Windows Optional Features

Press Windows R to start Run.

Enter the following command and press Enter.

optionalfeatures

Now scroll the list to find .Net Framework 3.5 in the list and click and expand the same. Check the box for .Net Framework 3.5 if it's not already checked.

#Check the boxes for the list below.

• Windows Communication Foundation HTTP Activation
• Windows Communication Foundation Non-HTTP Activation

Now click and expand .Net Framework 4.8 Advanced Services. If it is not checked, check the same box.

Check the checkboxes in the list below.

• ##ASP .NET 4.8
• WCF Service

Click

OK.

The selected features will now be installed on your system and you may be asked to perform a reboot. We recommend that you perform an early restart and try using the application that caused the 0xc0000135 error again. If everything is working as expected, the 0xc0000135 error should now be resolved on your system.

Method 2: Using CMD

We can also use CMD to enable and install the same feature. Please follow the tutorial below to help you through the process.

Press

Windows R to start the Run dialog box.

Type the following and press

Ctrl Shift Enter.

cmd

Now use the following commands to install .Net Framework 3.5 and 4.8 on your PC. Execute each command one by one to complete the process.

• dism /online /enable-feature /featurename:netfx3 /all

• dism /online /enable-feature /featurename:WCF-HTTP-Activation

• ##dism /online /enable-feature /featurename :WCF-NonHTTP-Activation

Restart your PC for good results and 0xc0000135 should now be fixed when launching third-party applications.

Fix 2: Clear Cache Files

There is no single toggle for clearing cache files in Windows 11, especially if you want to clear system cache files. Therefore, you can use this comprehensive article of ours to completely remove cache files from your system.

Remaining cache files are known to cause .Net Framework issues, especially on systems that virtualize different environments. If you have a similar PC, then we recommend you to follow this tutorial to clear cache files from your PC.

Fix 3: Last resort: Uninstall update KB5013943

This is not a recommended solution, but if you are desperate to have everything running on your PC again, then you can uninstall the latest Windows 11 update , namely: KB5013943. Use the following tutorial to help you uninstall Windows updates from your system.

Press

Windows i to start the setup. Click Windows Update.

Click

Update History.

Scroll to the bottom and click

Uninstall updates.

Click Uninstall

next to KB5013943 .

Click

Uninstall

again to confirm your choice.

#The selected updates will now be uninstalled from your system. Once this process is complete, your system should automatically restart. If not, we recommend you restart it manually. After restarting, your PC should work as expected and you should no longer encounter the 0xc0000135 error.

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