Contents

How to fix Windows Update error 0x80070643: Complete information

February 28, 2025 22 views


Windows Update is one of the best methodologies for keeping up with your system's updates and, at the same time, providing error-free updates. However, an error in the middle of an update that once again restricts one from installing the latest patches or security updates is a source of disturbance for any user. It is known as 0x80070643, and most of the time, this kind of error comes along when trying to install any updates or software updates via Microsoft Store. The article takes some of the causes of the error alongside various solutions to the adequate fixation of Windows update error 0x80070643.

What is Windows Update Error 0x80070643?

But let us understand what it actually is: Error 0x80070643 is developed through corrupted system files, a corrupted Windows Update facility, or a corrupted third-party application, which restricts Windows from updating or installing software at a particular point in time. These types of error messages have become a typical scenario when either you're performing critical patch installations or a security-related update for an OS.

It will manifest through, among other forms of descriptions presented below: 

  • "Error 0x80070643: Failed to install the update."

  • "Windows Update encountered an unknown error."

  • "There were problems installing some updates."

As much as the error might seem to present a complex problem, it is usually surmountable through various troubleshooting measures.

Common Windows Update Error 0x80070643 Causes

A set of factors is responsible for showing error 0x80070643 during any update. In this respect, some of the common causes will include:

1. Partially or Fully Corrupted Update Files: Windows will never apply those updates whose update files are partially or entirely corrupted.

2. The Windows Update service has gone into disarray/ has been turned off. Such an action like this, which is in a malfunctioned/ disabled state, will not allow an update to be installed.

3. Corruption of system files shall directly affect Windows update-related processes and result in error code 0x80070643

4. Conflict created due to conflicting third-party Antivirus hinders proper execution of a window update.

5. Infected.NET Framework: this, too, can be experienced if any problem is found in the Dot Net Framework used to install the updates.

6. Software pending or broken installation: pending installation of any software or any earlier broken installation may cause error repeated creation.

Now that we have examined what might be behind this problem, we should consider some of the ways to fix error 0x80070643 efficiently.

Solution 1: Run Windows Update Troubleshooter

Run the inbuilt Windows Update Troubleshooter, which offers quick and potent remedies for fixing Windows Update error 0x80070643. It will find any problems that block your system from working correctly with Windows Update and then fix them.

How to Run the Troubleshooter :

Step 1: Press the Windows key + I to open the Settings app.

Step 2: Tap Update & Security, then tap the Troubleshoot option from the left-hand sidebar.

Step 3: Scroll down, tap Additional Troubleshooters to locate the Windows Update Troubleshooter, tap Windows Update, and then Run the troubleshooter.

Step 4: Then, search for issues regarding Windows Update and try to fix them automatically.

Step 5: Restart your computer to see whether the update error has vanished.

Run the Window Update Troubleshooter to let it automatically fix many common problems. This will be your first step in solving 0x80070643.

Method 2: Reset the Windows Update Components

Where the troubleshooter does not fix this, you should go ahead with the manual resetting of the Windows Update components. This will clear corrupted files under the update cache and reset all the services concerning Windows updates. How to Reset Windows Update Components

Step 1: Open elevated Command Prompt The key combination would be Windows + X, and further selection between the options Command Prompt (Admin) and Windows PowerShell (Admin) is available to be selected:

Step 2: Stop the Windows Update Services: Open your Command Prompt and run the commands one after another. After every command, press Enter.

Net stop wuauserv

net stop bits

net stop cryptsvc

Step 3: Rename the SoftwareDistribution Folder: This folder contains temporary files that may be corrupted. Rename it by giving the following command in Command Prompt:

Ren C:\\Windows\\SoftwareDistribution SoftwareDistribution.old

Step 4: Restart the Update Services: Once the above folder has been renamed, one can restart these services. For that, type the following commands:

net start wuauserv

net start bits

net start cryptsvc

Step 5: Rerunning Windows Update should do the job for you after the above steps.

This will reset the Windows Update components, thereby clearing away corrupted files that were preventing your computer from updating correctly.

Method 3: Run SFC and DISM for Repair of Corrupted System Files

System file corruption is another common cause of Windows Update errors. In such a case, you can utilize the facilities provided by utility tools such as System File Checker, Deployment Imaging Service, and Management utility. These utilities scan the system for damage in system files causing an error and fix the fault.

How to use it:

Step 1. Press the Windows key + X, open Command Prompt as administrator, or select Command Prompt or Windows PowerShell Admin.

Step 2: sfc /scannow: After running it in the Command Prompt window, click the Enter button. Let your system begin scanning damaged files by itself; after that, it will try to replace any such file automatically.

Note: It may take some time.

Step 3: Run DISM Finally, once the SFC scan is over, this command is going to restore the health of the Windows image:

DISM /Online /Cleanup-Image /restore health

This, too, might take some reasonable time; hence, be patient.

Step 4: Now, reboot your PC and check whether the issue is gone after these two utilities have made their repairs.

It runs these utility programs to remedy some system file corruption issues that interfere with Windows Update.

Method 4: Temporarily Disable Third-Party Antivirus

Windows update errors could also be caused by interfering with third-party antivirus software. One such commonly arising error due to this problem is 0x80070643. Temporarily disabling your Antivirus could resolve it.

Here it is:

Step 1: Switch the Antivirus Software off: Open your Antivirus and look for options to temporarily turn it off. The exact procedure depends on your software.

Step 2: Check for Updates: After turning off your Antivirus, check for updates from Windows again.

Step 3: Turn Antivirus on: When the update process finishes, remember to return your antivirus program to the On position.

This measure will be helpful if suspicions fall on the interference of the antivirus program with Windows Update.

Method 5: Reinstall.NET Framework

In case an error appears when you install the updates involving the NET. Framework – You can reinstall this framework. Here is how to perform this action:

Step 1: Open the Control Panel using the Windows key + R, type control, and press Enter.

Step 2: Click Programs, then Programs and Features.

Step 3: In the list of all installed programs, find Microsoft.NET Framework.

Step 4: Right-click on the selected ".NET Framework" and click "Uninstall." After uninstalling, reinstall the latest version downloaded from the official website provided by Microsoft.

Reinstalling the framework for .Net may resolve your update problem relying on this module.

WPS Office and Windows Update Error 0x80070643

While most of the above remedies may actually be quite useful for the 0x80070643, one should have updated their system with the support of WPS Office, completing Windows Update and adding the following features to the system: an intelligent office suite embedded with automation capabilities, auto-backup of your files that can be included in another cloud storage or even WPS Cloud.

Meanwhile, some document-related errors or any update that did not install successfully would be effective ways in the WPS Office to assist in document management while trying to solve the core issues.

100% secure

FAQs

1. Why does Windows error 0x80070643 occur?

This Windows 0x80070643 occurs for many reasons, such as corrupted files and service disturbance, particularly within Windows Update due to interference through antivirus programs or the .Net framework.

2. Can error 0x80070643 be fixed without reinstalling Windows?

Yes, you can. Running the Windows Update Troubleshooter, resetting Windows Update components, or repairing system files using SFC and DISM would fix this error without reinstalling Windows.

3. Should I turn off my Antivirus to repair error 0x80070643?

If you feel that your Antivirus is interfering with the installation process of your update, turn it off during the installation, but remember to turn it back on afterward.

Summary

It's such an annoying Windows Update error 0x80070643. On the bright side, it can be resolved with super easy steps: running the built-in troubleshooter, updating components reset, repairing system files, or identifying conflicts with antivirus or the framework of.NET. Besides, WPS Office offers advanced productivity through AI-powered features, cloud integrations, and document management that keep your work going while resolving system issues.

100% secure


15 years of office industry experience, tech lover and copywriter. Follow me for product reviews, comparisons, and recommendations for new apps and software.