0x80070643 - how to remedy

If you receive a message with the error code 0x80070643 on your Windows PC or laptop, an update could not be performed successfully. What possible reasons there are for the occurrence of the error and how to fix it, we explain in this article.

This is the cause of the 0x80070643 error

Since a major update for Windows 10, more and more users are reporting that they are experiencing the 0x80070643 error. Error 0x80070643 is an update error that occurs when you try to update Windows itself or a program installed on the computer. To prevent the error from occurring, it may help to perform an update for the .NET Framework. This is particularly important for the successful installation of system updates and, if missing or corrupted, can trigger the 0x80070643 error.

1. To reinstall the .NET Framework on your computer, first download it from the Microsoft website.
2. Then open the download file and follow the instructions of the installation wizard.
3. Once you have installed the .NET Framework, please restart your PC and try to perform the previously failed update again.

Error 0x80070643: Update Windows Defender

If error 0x80070643 continues to occur even after reinstalling the .NET Framework, the cause may be Windows Defender. In this case, it is necessary for you to manually download Windows Defender from the Internet and install it on your Windows PC. If the installation was successful, please restart your computer and try if the update can now be performed without errors.