5 Practical Ways to Fix Windows Update Error 0x80070643

Windows updates are crucial for the health of your computer. They provide security patches, new features, and bug fixes. But what happens when you encounter an error during an update? One common issue is the Windows update error 0x80070643.

This error of 0x80070643 – ERROR_INSTALL_FAILURE usually appears when there's a problem with the installation of an update, particularly with .NET Framework updates or Windows Defender definitions.

Possible Reasons Behind Windows Update Error 0x80070643

Before we start discussing solutions, it is crucial to understand what may be causing the Windows update error 0x80070643. Here are some common culprits:

• Corrupted .NET Framework: This is often the main cause of the error 0x80070643.
• Malware or virus infection: These may interfere with the update process.
• Problems with Windows Installer: A corrupted or outdated Windows Installer may cause problems.
• Incomplete or failed previous updates: If a previous update did not install correctly, it may block the new update.
• Corrupted system files: Corrupted system files may stop the update process.

How to Fix Error 0x80070643 on Windows Update?

Now, let’s move on to the solutions. If you encounter the the error of 0x80070643– ERROR_INSTALL_FAILUREwhen installing KB5034441/KB5034440 in Windows 10/11, here are 5 options you can refer to.

Method 1: Restart Your Computer

Sometimes, the simplest solutions are the most effective. Restarting your computer can clear temporary files and refresh the system, potentially resolving the error 0x80070643 on Windows update.

1. Save your work: Ensure all your files are saved.
2. Restart your computer: Click on the Start menu, select the power icon, and choose Restart.
3. Retry the update: After your computer restarts, try running Windows Update again.

Method 2: Run the Windows Update Troubleshooter

Windows has a built-in troubleshooter designed to fix Windows update error 0x80070643. Here’s how to use it:

1. Open Settings: Press Win + I to open the Settings app.
2. Go to Update & Security: Click on Update & Security.
3. Run the Troubleshooter: Select Troubleshoot from the left-hand menu, then click on Windows Update and choose Run the troubleshooter.
4. Follow the prompts: The troubleshooter will attempt to identify and fix the problem. Follow any on-screen instructions.

Method 3: Repair the .NET Framework

Since a corrupted .NET Framework can cause the Windows update install error 0x80070643, repairing it might solve the problem.

1. Open Control Panel: Search for Control Panel in the Start menu.
2. Go to Programs and Features: Click on Programs and then Programs and Features.
3. Find .NET Framework: Look for Microsoft .NET Framework in the list of installed programs.
4. Repair: Select it, then click on Uninstall/Change and choose Repair. Follow the on-screen instructions to complete the repair.

Method 4: Use the System File Checker Tool

The System File Checker (SFC) tool can scan and repair corrupted system files.

1. Open Command Prompt as an administrator: Search for cmd in the Start menu, right-click on Command Prompt, and select Run as administrator.
2. Run SFC: Type sfc /scannow and press Enter. This process might take some time.
3. Follow up: If SFC finds and repairs corrupted files, restart your computer and try running Windows Update again.

Method 5: Perform a Clean Boot

A clean boot can help you determine if background programs are interfering with the update process.

1. Open System Configuration: Press Win + R, type msconfig, and press Enter.
2. Go to the Services tab: Check the box for Hide all Microsoft services, then click on Disable all.
3. Disable Startup items: Go to the Startup tab and click on Open Task Manager. Disable all startup items.
4. Restart your computer: Restart your computer, then try running Windows Update.

How to Recover Deleted/Lost Files with Ease?

In the aftermath of a Windows Update Error 0x80070643, the loss of files can be disheartening. MyRecover, a powerful data recovery tool that serves as a beacon of hope in such situations. MyRecover excels in retrieving lost data with its user-friendly interface and high success rate.

MyRecover

Professional Transcend SD Card Recovery Software

 

• Recover the deleted/lost Word documents, Excel, PPT, PDF, Photos, Videos, Audio, folders, compressed files, and other 200+ types of data from HDD, USB, SD cards, etc.
• During scanning, you can search your desired files by typing their filenames in the search bar or wait to see the deleted and other lost files on your computers after Quick Scan and Deep Scan.
• Whether the videos lost due to accidental deletion, formatted disks, virus infection, computer crashed recovery, etc.
• Support NTFS, exFAT, FAT32, and ReFS file systems in Windows 11, 10, 8, 7, and Windows Server PC.

Download Software
Windows 11/10/8.1/8/7& Windows Server

100% Secure

The software also has a free version, which you can use to recover lost files up to 500MB for free. So, you can download MyRecover to have a try!

Step 1. Install and run MyRecover on your Windows PC. Hover the mouse over the drive saved deleted or lost files before, and click Scan.

Step 2. You can search your desired files or wait to view your deleted and missing files after Quick Scan and Deep Scan.

Step 3. Locate the files you want and click “Recover x files” to recover your chosen files. Please save these recovered files in a different location.

In Conclusion

In the realm of Windows updates, Error 0x80070643 may pose challenges, but armed with knowledge and the right tools, you can conquer it. From understanding the potential causes to employing MyRecover for data recovery and implementing various fixes, this guide equips you to navigate the troubleshooting landscape successfully. Bid farewell to update woes and embrace a seamlessly updated Windows experience.

FAQs on Windows Update Error 0x80070643

1. What causes Windows update error 0x80070643?

The error can be caused by corrupted .NET Framework, malware infections, issues with Windows Installer, incomplete previous updates, or corrupted system files.

2. Can I fix Windows update error 0x80070643 by myself?

Yes, following the steps outlined in this article, you can troubleshoot and resolve the error without needing professional help.

3. How do you update Windows 10?

Your Windows PC is set to download and install updates automatically. If you want to manually download an update, follow these steps: select Start > Settings > Update & Security > Windows Update. If an update is available, you can download it from here.

4. How to turn off Windows 10 updates?

To temporarily pause Windows updates: go to Settings > select Update & Security > click Advanced Options > choose Pause updates. You can disable updates for 35 days at a time.

5. How do you update a graphics driver in Windows 10?

To update your graphics driver, download and install the latest version from the manufacturer's website. Here’s how:

For Nvidia GPUs: Go to the Nvidia Downloads Page, select your GPU model from the drop-down menus, and download the appropriate driver.

For AMD GPUs: Visit the AMD Drivers and Support Page, find your GPU model, and download the latest driver.

6. How do you roll back a Windows update?

If a recent Windows update is causing issues on your PC, you can uninstall it: Select Start > Settings > Update & Security > Windows Update > View your update history > Uninstall updates. Right-click on the update you want to remove and select Uninstall.

7. How often should I run Windows Update Troubleshooter?

It's advisable to run the Windows Update Troubleshooter whenever you encounter issues with Windows updates. Consider making it a routine after major system changes.

8. Can I use MyRecover for recovering files on external drives?

Absolutely! MyRecover can recover deleted files from external hard drives, providing a versatile solution for data loss scenarios.