Resolving SQL Server 2019 Installation Error 0x80070003

Several methods can help resolve error code 0x80070003 when installing SQL Server 2019:

1. Ensure system compatibility: Confirm your system's hardware, software, and OS meet the minimum requirements for SQL Server 2019.
2. Disable antivirus temporarily: Antivirus software might interrupt the installation. Temporarily disable it and retry the installation process.
3. Run as administrator: Right-click the SQL Server 2019 installer and select 'Run as administrator' to grant necessary permissions.
4. Check installation media: If using a DVD or USB drive, ensure the media isn't damaged. You can also copy the installation files to another location and run from there.
5. Perform system cleanup: Remove temporary files, old installations, and other unnecessary files to free up space and reduce error chances.
6. Review Windows Update settings: Ensure your Windows Update settings are correct. Install any pending updates before attempting the installation again.