How to Resolve the Download Error 0x80070643: A Comprehensive Guide

download error - 0x80070643


Experiencing a “download error – 0x80070643” can be frustrating, especially when it interrupts system updates or software installations. This error typically occurs in Windows environments and can stem from various issues related to .NET Framework installations, update services, or system file corruption. This guide will walk you through multiple solutions to resolve the error and ensure your system operates smoothly.

Error 0x80070643

The “download error – 0x80070643” often appears during Windows updates or when installing or updating software, particularly Microsoft Office or .NET Framework. It indicates a failure in the installation process due to corrupted files, conflicts in system services, or permissions issues. Understanding the root cause is crucial for effective troubleshooting.

Check Your Antivirus Software

Antivirus software can often interfere with Windows updates, leading to the “download error – 0x80070643.” Temporarily disable your antivirus program and try running the update or installation again. Ensure to re-enable your antivirus after completing the process to keep your system protected.

Restart Windows Update Services

Restarting the Windows Update service can resolve issues causing the “download error – 0x80070643.” To do this, open the command prompt as an administrator and type specific commands to stop and then restart the update services. This method refreshes the service and can clear up any temporary glitches affecting updates.

Repair .NET Framework Installation

Since this error is commonly associated with .NET Framework issues, repairing the installation might help. You can do this through the Control Panel or by downloading the .NET Framework Repair Tool from Microsoft’s official website. This tool can automatically detect and fix errors related to the .NET Framework.

Run the Windows Update Troubleshooter

Windows includes a built-in tool to diagnose and fix common issues with updates. Running the Windows Update Troubleshooter can automatically resolve problems leading to the “download error – 0x80070643.” Access this troubleshooter through the Settings app under the “Update & Security” category.

Perform a Clean Boot

Performing a clean boot for your computer can help identify if third-party applications are causing the “download error – 0x80070643.” This process involves starting Windows with a minimal set of drivers and startup programs, allowing you to manually enable services and applications to isolate the problematic software.

Use System File Checker (SFC)

The System File Checker (SFC) tool scans for corruption in Windows system files and restores them if possible. Running this tool can fix files that are crucial for updates and might solve the “download error – 0x80070643.”

Update Windows Manually

If automatic updates keep failing with the “download error – 0x80070643,” consider manually downloading and installing the updates. You can find the specific updates on the Microsoft Update Catalog website, download them, and install them manually to bypass the issues with the Windows Update service.

Reset Windows Update Components Manually

Sometimes, more in-depth troubleshooting is required. Resetting Windows update components involves manually deleting update files and re-registering the update DLLs. This can clear up any persistent issues causing the “download error – 0x80070643” and allow the update process to start afresh.

Contact Microsoft Support

If none of the above solutions work, the issue might be more complex and require professional assistance. Contacting Microsoft Support can provide additional insights and specialized help to resolve the “download error – 0x80070643.”


The “download error – 0x80070643” is a common issue that users may encounter, but it is generally resolvable with the right approach. By systematically applying the solutions provided in this guide, you can troubleshoot and fix the error, ensuring your system remains up-to-date and secure. Remember to back up your data regularly to avoid data loss during troubleshooting.


1.What causes the “download error – 0x80070643”?

This error is commonly due to issues with .NET Framework installations, corrupted system files, or conflicts with antivirus software.

2.Can this error prevent Windows from updating?

Yes, the “download error – 0x80070643” can block Windows Update, preventing your system from receiving important security patches and feature updates.

3.Is it safe to disable antivirus software to fix this error?

Temporarily disabling antivirus software can help fix this error, but it should be re-enabled immediately after the troubleshooting process to maintain system protection.

4.What should I do if the error persists after applying all troubleshooting steps?

If the error continues, it might be best to contact Microsoft Support for further assistance or consider restoring your system from a backup.

5.Can running the System File Checker (SFC) affect my personal files?

No, running the SFC tool affects only system files and will not alter personal files or applications on your system.

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