0x80070643 errors occur in Windows Update when updates attempt to install. This article explains how to resolve this error.

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. Sometimes, the WinRE (Windows Recovery Environment) partition is 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.

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

   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 retry the update. Antivirus programs are known to interrupt software updates.

   Turn your antivirus program back on after you complete this task.

8. Restart Windows Installer. A glitch in the Windows Installer can cause the 0x80070643 error. Search Windows for services.msc, highlight Windows Installer and select the Restart link on the left.

Causes of 0x80070643 Errors

This error almost always occurs inside the Windows Update utility, usually accompanied by a larger message. Here are the two most common ways this error presents itself:

• 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 2025 – 0x80070643