Step-by-Step Guide to Resolve Error 0x80070643 When Installing Office 2021

To address the error code 0x80070643 during Office 2021 installation, follow these steps:

1. Restart your device: Begin by rebooting your computer. This can resolve issues by clearing temporary files and stopping running processes that may interfere with the installation.
2. Temporarily disable antivirus software: Antivirus programs can occasionally prevent software installation. Disable your antivirus temporarily and attempt the Office 2021 installation again.
3. Update Windows: Ensure your Windows operating system is fully updated. Outdated systems can cause compatibility issues with new software installations. Update Windows and try the installation again.
4. Remove previous Office versions: Conflicts with existing Office installations can lead to installation errors. Uninstall any previous versions of Office before attempting to install Office 2021.
5. Run the Microsoft Office Installation Troubleshooter: Microsoft provides a specialized troubleshooter to resolve common installation issues. Use this tool to diagnose and resolve problems affecting your Office 2021 installation.