Windows Update Error 0x80070643

Last Update: September 1, 2021

Windows Update Error 0x80070643

If you are seeing an error code 0x80070643 on your Windows computer, you are not alone. Many Windows users have reported this error. Usually this error occurs when they are trying to update their Windows system or to install a programs.

The KB4048955 update for Windows 10 introduced some quality improvements and other elements that claimed to resolve security vulnerabilities. However, a bug caused error 0x80070643 to pop up every time the users tried to install the update. Error 0x80070643 is a general Windows Update installation error code that can appear on your computer screen during installation.

Windows Update, Defined

Windows Update is a useful tool that Microsoft has provided to keep your PC or laptop up-to-date. It’s important to have this tool working properly because it can help prevent data breaches and malware attacks.

In Windows 10, you get to decide how frequent and when to get the latest update. To manage this option, you can go to the Check for Updates section, which can be accessed by clicking the Start button, going to Settings, clicking Update and Security, and finally, choosing Windows Update.

Pro Tip: Run a dedicated PC optimization tool to get rid of incorrect settings, junk files, harmful apps, and security threats that can cause system issues or slow performance.

What does 0x80070643 mean?

Windows Error code 0x80070643 is an error caused during installation. It may be caused by a server-side problem and you may retry the installation or check the internet connection. Try restarting the computer after running the Windows Update Troubleshooter.

What Causes Error Code 0x80070643?

The reasons for Windows error code 0x80070643 are various. Here are some main causes:

The system settings are not correct.

Your computer is attacked by malware or viruses.

There is a driver malfunction.

Some system files are corrupted or missing.

Some old programs are not correctly removed.

Your computer is not shut down properly.

Knowing these reasons can help you find the best solutions. We collect some useful solutions and show you them as follows.

How to Fix Windows Update Error 0x80070643

How to Fix Windows Update Error 0x80070643

Try these steps in the order listed until the message disappears and the update is successful:

1. Retry the installation. Sometimes, attempting the installation or update again will work, so it’s worth trying at least once more before proceeding with any further troubleshooting.

2. Re-download the file. If you downloaded an update or an app and it displays the 0x80070643 error message, the file may have become corrupted during the download process. Download it again to see if that fixes the problem.

3. Uninstall and reinstall the app. If the 0x80070643 error occurs during an app update, the existing version of the app may be corrupted. Use the Windows uninstaller to remove the program, then reinstall it. The newest version should be installed so you won’t need to update it.

4. Check the internet connection. If an update requires a connection to an online server, then a buggy internet connection can stall the installation process. If an internet speed test reveals a weak connection, there are a number of ways to fix a slow internet connection.

5. Close all other programs. Sometimes running other programs can affect an update or installation by accessing important files and using device resources. Close all open programs on your Windows PC, and quit any programs that might be running in the background (like Telegram or Skype).

6. Pause current downloads and updates. Other downloads and updates could be interfering with the app you’re trying to update. In Windows 10, open the Microsoft Store app and select ellipses (…) in the upper-right corner, then choose Downloads and updates. Make sure no other apps are being updated or installed, and then try the installation again.

7. Restart the computer. A Windows PC reboot can fix a variety of Windows glitches.

8. Run the Windows Update Troubleshooter. The Windows Update Troubleshooter scans and corrects problems associated with the operating system and app updates. On Windows 10, go to Settings > Update & Security > Troubleshoot > Windows Update and select Run Troubleshooter.

9. Install the latest .NET Framework. A corrupted .NET Framework can cause installation and update errors. Make sure the latest .NET Framework update from Microsoft is installed on the computer.

10. Run the .NET Framework Repair Tool. If you have the latest .NET Framework update and you still get the 0x80070643 error, run the .NET Framework Repair Tool.

11. Disable antivirus software. Antivirus programs are notorious for prompting conflicts with app installation and system functions. Turn off any such software you have installed, then attempt the update or installation again.

12. Perform an SFC scan. An SFC scan can detect and fix corrupted system files on a computer. To run a scan, open the Command Prompt, type sfc /scannow, then press Enter.

13. Restart Windows Installer. A glitch in the Windows Installer sometimes generates the 0x80070643 error. Go to Windows Services and select Windows Installer once to highlight it, then select the Restart link to its left.

Error 0x80070643 FAQs

How do I fix error 0x80240fff?

1. Run Windows Update Troubleshooter

2. Disable Windows Firewall temporarily

3. Restart the Background Intelligent Transfer Services

4. Fix file corruption

5. Check and fix hard disk issues

How do I fix error 0x800f0831?

1. Use Windows Update Troubleshooter

2. Run SFC scan

3. Disable Proxy

4. Change Windows Update Service

5. Enable .NET Framework 3.5

6. Perform a System Restore

How do I fix error 0x80070422?

1. Use Services

2. Set up Background Intelligence Transfer Service

3. Upgrade Windows 10

How do I fix error 0x80070424?

1. Run Windows Update Troubleshooter

2. Enable Windows Update Services

3. Reset Windows Update Components

4. Check Windows Update Setting in Registry

5. Repair Windows Update Files

Summary

Windows update error 0x80070643 is typically caused by a driver malfunction or an incorrect system settings configuration. However, it can also be triggered by a lot of things, such as a malware infection, corrupted system files, improper shut down of your computer, or a problematic .NET framework.

If this error happens to you, try reinstalling the update first because it might be the case of a temporary problem that can be resolved in a few minutes. If it does not work, download the update file once again or uninstall any recently installed apps. You can also try running the System File Checker tool and see if that fixes your problem. You could also restore an earlier version of your computer’s registry from backup to solve the issue as well.