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Resolving Error Code 0x80070643: Office 2021 Installation Failure

Follow these steps to fix the error code 0x80070643 during Office 2021 installation:

  1. Restart your computer and attempt to install Office 2021 again.
  2. Temporarily disable your antivirus software and retry the Office 2021 installation.
  3. Ensure your Windows OS is updated. If not, update it and then try the installation again.
  4. Remove any previous Office versions that could be causing conflicts with the Office 2021 installation.
  5. Utilize the Microsoft Office Installation Troubleshooter to detect and resolve installation issues.

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