Error 0x80070643 - all info about the error code

If you receive error 0x80070643 on Windows 10, it is often related to Windows Defender or the .NET Framework. The error message usually occurs when updating the system or applications.

Fix Error 0x80070643 - .NET Framework install

If a system or software update fails and you receive error code 0x80070643, the reason may be a problem with the .NET Framework.

1. Go to the Microsoft website in your browser.
2. Enter ".Net Framework" in the search box.
3. Select the first result titled "Download .NET Framework | Free official downloads".
4. You will then get a list of all available versions. Click the most recent one to access the download page.
5. Download the runtime version from the download page.
6. Open the downloaded file and run the installation using the installation wizard.
7. Finally restart the computer and try to install the previously failed update again.

Update Windows Defender

In addition to the .Net Framework, Windows Defender can also be the cause of the error. Manually updating Defender can help fix the problem.

1. To do this, go to the Microsoft Security Intelligence download page via the URL https://www.microsoft.com/en-us/wdsi/defenderupdates in your browser.
2. Download the latest Defender.
3. Run the installation file. This is a silent installation that runs in the background.
4. Wait a few minutes and then restart the computer.
5. Now try again to install the failed update.