Windows 10 Pro 64-bit Installation Error: One Update Constantly Fails (Error 0x80070643), No KB Update Number

Windows 10 Pro 64-bit Installation Error: One Update Constantly Fails (Error 0x80070643), No KB Update Number

Have you ever encountered an issue while installing updates on your freshly installed Windows 10 Pro 64-bit system? Specifically, the update with the error code 0x80070643, which doesn't mention any KB update number? You're not alone. This article will provide a detailed guide on how to tackle this problem and ensure a smooth installation process.

Understanding the Issue

The error code 0x80070643 typically indicates a problem with the Windows update service. It can occur due to various reasons, such as corrupted system files, incorrect registry entries, or insufficient system resources. This error can be particularly frustrating, as it may prevent you from installing essential updates and drivers, even after installing optional updates.

Identifying the Problematic Update

Since the error message doesn't specify the KB update number, you'll need to manually identify the problematic update. To do this, follow these steps:

1. Press Windows key + I to open Settings.
2. Click on Update & Security.
3. Click on View update history.
4. Look for updates with a failed status and note down the KB update number.

Resolving the Issue

Now that you've identified the problematic update, you can try the following solutions to resolve the issue:

Solution 1: Repair Corrupted System Files

Corrupted system files can cause the Windows update service to fail. To repair them, use the System File Checker (SFC) tool:

Solution 2: Reset Windows Update Components

Resetting the Windows Update components can help resolve the issue:

1. Stop the Windows Update service, Background Intelligent Transfer Service, and Cryptographic services.
2. Rename the SoftwareDistribution and Catroot2 folders.
3. Restart the services you stopped in step 1.

Solution 3: Perform a Clean Boot

A clean boot can help eliminate software conflicts that might be causing the issue:

1. Press Windows key + R, type msconfig, and press Enter.
2. Go to the Services tab, check Hide all Microsoft services, and click Disable all.
3. Go to the Startup tab, click Open Task Manager, and disable all startup items.
4. Close Task Manager, click OK in System Configuration, and restart your computer.

Solution 4: Reinstall Windows

If none of the above solutions work, you might need to reinstall Windows. Make sure to back up your data before doing so.

References

• Microsoft. (2021). Use the System File Checker tool to repair missing or corrupted system files. https://support.microsoft.com/en-us/topic/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system-files-79aa86cb-ca52-166a-92a3-966e85d4094e
• Microsoft. (2021). Reset Windows Update components manually. https://support.microsoft.com/en-us/topic/manually-reset-windows-update-components-3145685-8e6a-4bfa-a332-26bb74a7c68d
• Microsoft. (2021). Perform a clean boot in Windows. https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd