Troubleshooting RPC Server Error 0x800706ba for Office 2021 Setup

To address the error code 0x800706ba during the Office 2021 setup, follow these procedures:

1. Reboot your system: Often, rebooting your system can rectify the problem. Restart your computer and attempt the Office 2021 installation once more.
2. Verify the RPC service status: Hit the Windows key + R to launch the Run dialog box. Enter 'services.msc' and hit Enter. Search for the 'Remote Procedure Call (RPC)' service and ensure it's active. If not, right-click it and choose 'Start'.
3. Set the RPC service to automatic: Within the Services menu, right-click the 'Remote Procedure Call (RPC)' service and select 'Properties'. Under the 'General' tab, verify that the 'Startup type' is set to 'Automatic'.
4. Ensure the Windows Firewall isn't blocking RPC: Press the Windows key + R to open the Run dialog. Type 'firewall.cpl' and press Enter. Navigate to 'Allow an app or feature through Windows Firewall' and confirm that 'Remote Assistance' and 'Remote Desktop' are permitted.
5. Disable any third-party antivirus programs: Occasionally, antivirus programs from third parties can obstruct the installation. Temporarily deactivate your antivirus and try installing Office 2021 again.
6. Utilize the Office installation troubleshooter: Microsoft offers a troubleshooting tool designed to automatically resolve common setup issues. Download and execute the Office installation troubleshooter available on the Microsoft site.