[FIXED] 80070643 – The Ultimate Guide to Tackle This Windows Update Error [2023 Edition]

by Sachin

The Windows Update error code 80070643 is a system-specific problem that occurs while installing updates on your Windows operating system. It’s typically associated with Microsoft Office or the .NET Framework updates and can cause these updates to fail, leading to potential security and performance issues. You may encounter this error due to several reasons, including faulty system files, incorrect system settings, or interference from your antivirus software.


  • Understand what 80070643 error is, and when it occurs.
  • Learn about basic troubleshooting steps to resolve this error.
  • Uncover several practical solutions to fix the issue, including software suggestions.
  • Learn how to prevent this error from recurring in the future.
  • Get answers to common FAQs about the 80070643 error.
  • Understanding the 80070643 Issue/Problem

What’s the Ideal Scenario Without the 80070643 Issue?

In an ideal scenario, without the 80070643 error, your Windows system updates would install smoothly and correctly, ensuring your PC operates optimally with the latest features and security patches. Regular system updates are essential for enhancing your computer’s performance, security, and stability. They address potential vulnerabilities and keep your system running efficiently.

When Does 80070643 Error Occur?

The error 80070643 typically surfaces during a Windows update or while installing Microsoft Office updates. It might also show up when you’re trying to install or update the .NET Framework. Whenever your system encounters this error, it stops the ongoing update process, causing the update to fail.

Basic Troubleshooting: Have You Tried These Steps?

Before you dive into the more advanced solutions, it’s important to ensure you’ve tried the following basic troubleshooting steps:

  • Restart your PC: In many cases, a simple restart can resolve system glitches that might be causing the error.
  • Check your internet connection: Make sure you have a stable internet connection for the update process.
  • Update your system drivers: Outdated system drivers can also cause update issues. Ensure all your system drivers are up-to-date.
  • Temporarily disable your antivirus: Sometimes, your antivirus software might interfere with the update process. Try disabling it temporarily and then run the update.

Why It’s Important to Resolve 80070643

The error 80070643 can prevent your system from installing crucial updates, which can expose your PC to potential vulnerabilities and impact its performance. Thus, resolving this error is vital to maintain your system’s security, stability, and overall performance.

6 Practical Solutions to Fix 80070643

SOLUTION 1: Try Windows Update Troubleshooter

Windows comes with a built-in troubleshooter that can help identify and resolve common update issues. Here’s how you can use it:

  • Open the ‘Settings’ app by pressing ‘Win+I’ keys together.
  • Go to ‘Update & Security’ > ‘Troubleshoot’.
  • Click on ‘Additional troubleshooters’.
  • Select ‘Windows Update’ and then click ‘Run the troubleshooter’.

SOLUTION 2: Reinstall .NET Framework

As the 80070643 error is often associated with the .NET Framework, reinstalling it can sometimes resolve the issue.

  • Go to ‘Control Panel’ > ‘Programs’ > ‘Programs and Features’.
  • Find ‘Microsoft .NET Framework’ in the list, click on it, and then click ‘Uninstall’.
  • After uninstalling, download the latest version of .NET Framework from the Microsoft website and install it. Image

SOLUTION 3: Repair Microsoft Office

If the error is occurring during a Microsoft Office update, repairing your Office installation might help:

  • Go to ‘Control Panel’ > ‘Programs’ > ‘Programs and Features’.
  • Find your Microsoft Office installation in the list, click on it, and then click ‘Change’.
  • In the window that opens, select ‘Repair’ and follow the on-screen instructions.

SOLUTION 4: Reset Windows Update Components

Resetting the Windows Update components can also fix update issues. Here’s how:

  • Press ‘Win+X’ and select ‘Command Prompt (Admin)’.
  • In the Command Prompt, type the following commands one by one, pressing ‘Enter’ after each:
    Copy code
    [net stop wuauserv]
    [net stop cryptSvc]
    [net stop bits]
    [net stop msiserver]
    [ren C:\\Windows\\SoftwareDistribution SoftwareDistribution.old]
    [ren C:\\Windows\\System32\\catroot2 catroot2.old]
    [net start wuauserv]
    [net start cryptSvc]
    [net start bits]
    [net start msiserver]

After running these commands, try updating again.

SOLUTION 5: Run System File Checker

System File Checker (SFC) is a utility in Windows that allows users to scan for corruptions in system files and restore them. Here’s how to run it:

  • Open Command Prompt as administrator.
  • Type sfc /scannow and press ‘Enter’.
  • The SFC tool will begin a system scan, which can take some time. Once it’s done, restart your computer.

SOLUTION 6: Reach Out to Support

If all else fails, it might be time to contact Microsoft Support for further assistance. They have a team of experts who can help diagnose and resolve your issue. You can reach them through the official Microsoft Support website.

How to Prevent 80070643 Error in the Future

To prevent the 80070643 error from recurring in the future, ensure that your Windows operating system, drivers, and applications (especially Microsoft Office and .NET Framework) are regularly updated. Also, keep your antivirus software up-to-date and ensure it’s not interfering with your system updates.


The 80070643 error can be frustrating, but with the right guidance, it’s solvable. We hope the solutions provided in this article have helped you resolve this error. Remember, while encountering errors like 80070643 can be a hassle, they’re usually solvable with a bit of troubleshooting. Don’t hesitate to reach out to Microsoft Support if you’re unable to resolve the issue on your own. Stay patient and persistent, and you’ll have your system running smoothly again in no time.

Frequently Asked Questions (FAQs) About 80070643

What is the 80070643 error?

The 80070643 is a Windows Update error that often occurs while installing updates for Microsoft Office or the .NET Framework.

Why am I seeing the 80070643 error?

You might see this error due to several reasons, including faulty system files, incorrect system settings, or interference from your antivirus software.

How can I fix the 80070643 error?

You can fix the error by using the Windows Update troubleshooter, reinstalling the .NET Framework, repairing Microsoft Office, resetting Windows Update components, or running the System File Checker tool. If all else fails, contact Microsoft Support.

How can I prevent the 80070643 error from recurring?

To prevent this error from recurring, make sure your system and applications are regularly updated, and your antivirus software is not interfering with your updates.

Can I contact Microsoft Support for the 80070643 error?

Yes, if none of the solutions works for you, reaching out to Microsoft Support is a good idea. They have a team of experts who can help resolve your issue.

What does the System File Checker tool do?

The System File Checker (SFC) is a utility in Windows that allows users to scan for corruptions in system files and restore them. Running this tool can help resolve the 80070643 error.

How can I ensure my antivirus software isn’t causing the 80070643 error?

Check your antivirus settings and ensure it’s not blocking or interfering with Windows Update or other system processes. You can also try temporarily disabling your antivirus software before running a system update.

Can reinstalling the .NET Framework help fix the 80070643 error?

Yes, sometimes the error might be due to issues with your .NET Framework installation. Reinstalling it can help resolve the error.

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