There’s no official response or workaround from Microsoft for the time being, but that’s not a reason to worry. We completed a couple of solutions that might help you fix this issue. This isn’t the only update issue that you can encounter. In fact, many users reported that There were some problems installing updates messages on their PC. But hopefully, this guide will help you with that.

Why does the KB5007651 update fail to install?

Before trying to get rid of the update error 0x80070643, it’s worth considering the more likely causes of the issue:

Third-party antivirus software conflicts – Antivirus software might conflict with the Windows Update service. Missing, outdated, or corrupted .NET Framework installation – Updates fail to install because .NET Framework is corrupted or missing, or you might need to install a newer version. Corrupted system files – You might have to repair corrupted system files causing the issue. Damaged Windows Update components – Some Windows Update components might be corrupted or incorrectly configured. Corrupted Windows Defender definitions – Error 0x80070643 can also arise because of corrupted Windows Defender definitions.

With these in mind, we will explore the most reliable solutions you may apply.

How can I fix the KB5007651 install error?

1. Run SFC and DISM scans

1.1 Run an SFC scan

If you want a faster and simpler scan, we recommend using Restoro, a tool specialized in scanning and repairing most types of issues on your computer. ⇒ Get Restoro

1.2 Run the DISM scan

2. Uninstall any duplicate updates

3. Reset Windows Update Components

4. Attempt a KB5007651 manual download

These four solutions should come in handy if you encounter the KB5007651 install error 0x80070643. We have not made these solutions in any particular order, so you should try what seems most appropriate. Do not hesitate to let us know which solutions also worked for you in the comments section.

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