How to Fix Windows Update Error 0x80070643

This error typically manifests within the Windows Update utility and is often accompanied by a more detailed message. Here are the two most frequent ways in which this error appears:

• There were some problems installing updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x80070643)
• Failed to install on [date] – 0x80070643

How to Fix Error 0x80070643

Try these steps in order until the message disappears and the update is successful:

1. Retry the installation. Sometimes, attempting the installation or update again will work, so it’s worth trying at least once more before proceeding with any further troubleshooting.

2. Restart your computer. It’s often the case that a simple reboot will reset what’s necessary for the installation to finish successfully.

3. Resize the recovery partition. The WinRE partition might be too small to complete the update. Complete this step only if you’re seeing the error for an update relating to the Windows Recovery Environment. KB5034441 is one such example.

   If you don’t feel comfortable completing this step, feel free to skip to the next suggestion below. In the meantime, you can pause Windows updates and wait for Microsoft to release a patch.

4. Run the Windows Update troubleshooter. This scans and corrects problems associated with the Windows Update utility.

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   On Windows 11, go to Settings > System > Troubleshoot > Other troubleshooter. Select Run next to Windows Update.

   On Windows 10, go to Settings > Update & Security > Troubleshoot > Windows Update and select Run Troubleshooter.

5. Install the latest .NET Framework. A corrupted .NET Framework can cause installation and update errors. Make sure the latest .NET Framework update from Microsoft is installed on the computer.

6. Run the .NET Framework Repair Tool. If you have the latest .NET Framework update and you still get the 0x80070643 error, this tool might help.

7. Disable your antivirus software and try the update again. Antivirus programs are notorious for interrupting things like software updates.

8. Restart Windows Installer. A glitch in the Windows Installer sometimes generates the 0x80070643 error. Search Windows for services.msc, select Windows Installer once to highlight it, then select the Restart link to its left.