8 Ways to Fix Windows Update Error 0x80070643

 Windows update error 0x80070643 stops you from installing the latest Windows updates. Learn why this error occurs and how can you resolve it with multiple solutions.

In this post, I will show you how to fix the Windows Update error 0x80070643 that occurs when you attempt to install the latest updates on Windows 11/10 devices. The error 0x80070643 can be resolved using different methods, which will be covered in this guide.

I ran across issue 0x80070643 on my Windows 11 PC when I was downloading the most recent updates. The update was stuck installing for a few minutes and finally resulted in error 0x80070643.

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In the screenshot below, you can see the 0x80070643 error appears while installing the Windows Defender antivirus definition updates. The complete error message is as follows: “There were some problems installing updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x80070643).”

Windows Update Error 0x80070643

Windows Update Error 0x80070643

Many users on Reddit and Microsoft forums also reported the error Failed to install on [specific date] – 0x80070643 while installing the cumulative and security updates on their Windows 10 and 11 PCs.

To be honest, there are numerous reasons why you may encounter this error, but the error code is crucial to figuring out what’s wrong. Not to worry, I’ll outline some crucial steps you can take to resolve error 0x80070643.

Table of Contents

Resolving Windows Update Error 0x80070643

The Windows update error 0x80070643 (-2147023293) translates to a fatal error during installation. This error can occur when system files are corrupted, a Microsoft .NET Framework installation is corrupted, or there are problems with the Windows Defender component.

Now that you know why the error code 0x80070643 occurs on a Windows PC while installing the updates, let’s go through some solutions that can help you resolve this issue.

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Solution 1: Retry Updates Installation

It is advised to attempt installing the failed update again if you encounter a 0x80070643 error when installing updates.

In the screenshot below, we see the update failed to install, resulting in error code 0x80070643. Click on the Retry button and see if Windows is successful in installing the update. If this doesn’t work, proceed to the next solution.

Error 0x80070643: Retry Updates Installation

Error 0x80070643: Retry Updates Installation

Solution 2: Update the .NET Framework

.NET Framework corruption is one of the common reasons why you may encounter error 0x80070643 on a Windows device. In such cases, you can either repair .NET Framework components using a repair utility or manually download and install the latest .NET version.

In general, you should not uninstall any versions of the .NET Framework that are installed on your computer because an application you use may depend on a specific version of the Dot NET Framework.

To update the .NET framework on your computer, follow these steps:

Browse to the .NET Framework website and download the latest version.

Run the Dot Net Framework setup and complete the installation.

Restart your computer, as it is required.

Now, run the update again, and it should be successfully installed without displaying the error code 0x80070643.

Also Read: Deploy Dot Net Framework 3.5 using ConfigMgr

Solution 3: Run Windows Update Troubleshooter

Using Windows Troubleshooter is another option to address error code 0x80070643. This utility will run on your computer and notify you of any problems with Windows update components.

You can run the Windows update troubleshooter on your Windows 11 computer with the following steps:

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Right-click the taskbar’s Start icon to select Settings.

Scroll down on the System tab to select Troubleshoot.

Click Other Troubleshooters to view the troubleshooters.

Then select the Run option for Windows Update.

The Windows update troubleshooter scans for issues related to Windows updates and attempts to fix them. The troubleshooter can identify the errors, such as 0x80070643 and resolve them. Normally, a restart is recommended after running the Windows update troubleshooter.