The error has been passed down from the previous Microsoft OS. This article examines the error and its causes and gives you the most reliable resolutions available for Windows 11 users.

What is the Windows 11 update error 0x80070643?

This error arises for some users when they try to install new patch updates via Settings. In fact, it is a Windows update error. And simply signifies that there have been issues with your update process. Before trying to get rid of the update error 0x80070643, it’s worth considering the more likely causes of the issue:

Third-party antivirus software conflicts – Antivirus software might conflict with the Windows Update service. Hence it would be best if you stuck to only compatible antivirus software. Missing, outdated, or corrupted .NET Framework installation – Updates fail to install because .NET Framework is corrupted or missing, or you might need to install a newer version. Corrupted system files – You might have to repair corrupted system files causing the issue. Damaged Windows Update components – Some Windows Update components might be corrupted or incorrectly configured. Corrupted Windows Defender definitions – Error 0x80070643 can also arise because of corrupted Windows Defender definitions.

To solve the error 0x80070643 in Windows 11, you must apply resolutions that can feasibly remedy those causes. Give these potential fixes a try right away.

How do I fix the install error – 0x80070643 in Windows 11?

1. Run the Windows Update troubleshooter

2. Run a system file scan

The SFC scan is a fast and effective way to identify system errors that may cause issues during Windows 11 installation. You can run this scan by following the steps below.

  1. First, bring up the search utility by clicking the magnifying glass button for that tool.

  2. Next, type the keyword cmd in the search box to find Command Prompt.

  3. Click the Command Prompt’s Run as administrator option on the right side of the search tool. SPONSORED

  4. Input this system file scan command and press Enter:sfc /scannow

  5. Thereafter, wait for the system file scan to reach the 100 percent mark and display its outcome in the Command Prompt.

In case you need to fix this Windows issue automatically, we advise using Restoro tool for comprehensive detection of the corrupted system files.

3. Install the latest .Net Framework 4.8

4. Repair .NET Framework

5. Temporarily turn off third-party antivirus software

Disable any third-party antivirus utility installed on your PC before you try installing the latest Windows updates in Settings.

6. Change the SoftwareDistribution subfolder name

7. Reset the Catroot2 folder

8. Update Windows Defender’s signatures 

We can’t promise that the above fixes are 100 percent guaranteed. If they’re not enough, resetting Windows 11 might also be worth a shot. Some third-party repair utilities can also fix many Windows update issues, such as error 0x80070643. These best Windows update repair tools are worthy of your attention as well. Let us know your opinion on the Windows 11 install error – 0x80070643 in the comments area below.

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