Troubleshooting Error Code 0x80070005: Access Denied During Office 2021 Installation

Here are several ways to fix error code 0x80070005 when installing Office 2021:

1. Run the installer with admin rights: Right-click the installer file and choose 'Run as administrator' to provide elevated permissions.
2. Temporarily disable antivirus: Antivirus programs can sometimes block installations. Disable your antivirus software briefly and rerun the installer.
3. Verify permissions: Ensure you have the proper permissions to install software. Check your user account settings for administrative rights.
4. Perform a clean boot: A clean boot can help resolve conflicts with other software. Restart your computer with minimal startup programs and try the installation again.
5. Use Microsoft Office Installation Troubleshooter: Microsoft offers a tool to diagnose and fix installation issues. Download and run this tool to address error code 0x80070005.
6. Repair or reinstall Windows: If other solutions fail, repairing or reinstalling Windows may resolve underlying problems causing the installation error.