Error Code 0x80070643 or 0x643 error code is common for all the Windows Operating systems when you try to install the updates. It usually appears when Windows 10 or Windows 7 update system is broken or there are network-related glitches.
Usual causes for this issue 0x80070643 or 0x643 error are communication failure over the internet with Microsoft update servers.
Solution 1: Windows Troubleshooter for Update Error 0x80070643
- Open the Settings app on your Windows device.
- Navigate to “Update & Security” and select “Troubleshoot.”
- Choose “Windows Update” and click on “Run the troubleshooter.”
Follow the on-screen instructions and check if the troubleshooter can detect and fix the issue.
Solution 2: Disable Proxy Internet Connection
Communication failure with Microsoft update servers can be caused by a proxy connection. To fix it, disable your proxy settings:
- Open Internet Explorer and click on Tools > Internet Options.
- Navigate to the “Connections” tab and click on “LAN Settings.”
- Ensure that the “Proxy server” checkbox is unchecked.
- Click “OK” to save your settings and try updating again.
If your antivirus is managing the proxy settings, disable them through your antivirus program settings.
Solution 3: Repair Windows Update Services
There are instances where Windows update services fail to function properly, leading to error code 0x80070643 or 0x643. To fix it, follow these steps to reset your update services:
- Open the Command Prompt as an administrator.
- Navigate to the C:Windows directory.
- Rename the “SoftwareDistribution” folder to “SoftwareDistribution.old.” If you face an issue renaming it, first stop the Windows update service by typing:
net stop wuauservand hitting Enter. - Once renamed, restart the Windows update service by typing:
net start wuauservand hitting Enter. - Now, check for updates again.
Solution 4: Run SFC Scan to Fix Windows Update Issues
The System File Checker (SFC) scan can be used to identify and fix corrupted system files that may be causing the update error.
- Open the Command Prompt as an administrator.
- Type the following command:
SFC /SCANNOWand press Enter. - Wait for the process to complete. If the scan finds and repairs issues, try updating again.
Note: If the SFC scan reports that some issues could not be fixed, you may need to perform further repairs.
Final Solution: Reinstall Windows Operating System
If the error persists after trying the above steps, reinstalling the Windows operating system may be the final resolution.
- Back up all personal data to ensure no files are lost during the reinstallation process.
- Follow the steps to reinstall your version of Windows.
Important: Ensure your hardware is compatible with the Windows version you are using.