Fix: 0x80070643 Update Error Code in Windows 11 or 10

Windows 11 or 10 update errors are pretty standard. One of them is Error Code 0x80070643. You may face this error while installing new patch updates on Windows 11/10. The error usually occurs because of third-party antivirus software conflicts, outdated/corrupted .NET Framework installation, corrupted system files, damaged Windows Update components, corrupted Windows Defender definitions., and various others. Do not worry; we will help you to fix the error 0x80070643.

How to Fix Windows 11 or 10 Update Error Code 0x80070643?

Method 1: Use Windows Update troubleshooter

Open the Settings app using Win + I key combination on your keyboard.

From the Settings app, tap on the Troubleshoot option in the System tab.

Tap on Other Troubleshooters options.

A list of all the Troubleshooters will appear where you have to select Windows update troubleshooter.

Follow the on-screen instructions to run the troubleshooter.

Method 2: Disable Third-Party Antivirus

If you are using third-party antivirus on your PC, then this could be the culprit for the error 0x8007064. So try disabling the third-party antivirus. You can temporarily uninstall the antivirus (in case disabling is not working) and check if the issue is fixed. If this method doesn’t help you, you should follow the next process.

Method 3: Run SFC Scan

Look for Command Prompt in the Start Menu.

Now Right-click on the Command Prompt option and Run it as administrator.

In the Command Prompt, execute the Command SFC /scannow.

Once the process is complete, close the command prompt & restart the PC.

It should fix the issue.

Method 4: Install .Net Framework Latest Verison

Make sure your PC is running the latest .Net Framework. If not, you can follow the below steps:

Visit the .NET Framework 4.8 page here.

Now download .NET Framework 4.8 Runtime.
To launch the installer, you have to double-click .NET Framework’s ndp48-web.exe setup file.
Follow setup wizard instructions to install the runtime package.