The Windows update error 0x80070643 that occurs when the update fails to install on your computer. If you wish to fix the Windows Update error code 0x80070643, follow the below-mentioned troubleshooting steps.

Windows update error 0x80070643

Method: 1

  • If the .NET Framework installation is corrupted on your Windows, use the .NET Framework Repair Tool to repair the corrupted files automatically.
  • If the problem persists, open the default browser and go to the official Microsoft site and download the latest .NET Framework.
  • Install it on your computer and check if the Windows update error 0x80070643 is resolved.

Method: 2

  • On your Windows desktop, click the Start menu and type “cmd” in the search panel.
  • From the search result, right-click on the Command Prompt app and select the Run as administrator option.
  • In the Command Prompt window, enter the “sfc /scannow” command and press the Enter button.
  • Wait until the scan is complete.
  • This will automatically detect and fix the problems on your computer.

Method: 3

  • On your Windows, right-click on the My Computer or This PC icon.
  • Click Properties from the pop-up menu.
  • Next, identify your system type (either 64-bit or 32-bit) and open the Windows Update window.
  • Note down the code of Windows update and open the default browser on your computer.
  • Navigate to Microsoft Update Catalog and type the update codes in the search panel.
  • Click the Download button near the update file that suits your system type.
  • After completing the download, install the downloaded file and check if the error Windows update error 0x80070643 is resolved.

Method: 4

  • Identify the type of your operating system and open the default browser.
  • Go to the official Microsoft site and download the update file for your Windows Defender Antivirus.
  • Complete the download and install the update on your computer.
  • After updating your Windows Defender Antivirus, restart your PC and check if the error is resolved.
  • If the problem Windows update error 0x80070643 remains unsolved, contact our technical support team.