Resolving Error Code 0x800706ba: RPC Server Unavailable When Installing Office 2021

To address the error code 0x800706ba encountered during Office 2021 installation, follow these steps:

1. Reboot your computer: A simple reboot can often resolve the problem. Restart your device and attempt the Office 2021 installation once more.
2. Verify RPC service status: Open the Run dialog with Windows key + R, type 'services.msc' and hit Enter. Locate 'Remote Procedure Call (RPC)' and ensure it's running. If it's not, right-click and choose 'Start'.
3. Ensure RPC service is automatic: In the Services window, right-click 'Remote Procedure Call (RPC)' and select 'Properties'. On the 'General' tab, confirm 'Startup type' is set to 'Automatic'.
4. Check Windows Firewall settings: Open Run dialog with Windows key + R, type 'firewall.cpl' and press Enter. Select 'Allow an app or feature through Windows Firewall' and confirm 'Remote Assistance' and 'Remote Desktop' are permitted.
5. Temporarily disable third-party antivirus: Third-party antivirus programs might interfere with installation. Disable your antivirus temporarily and retry the Office 2021 installation.
6. Use Office installation troubleshooter: Microsoft offers a troubleshooter tool that can automatically address common installation issues. Download and run the Office installation troubleshooter from the Microsoft website.