Resolving Installation Failure: SQL Server 2019 Error 0x80070643

Here are several effective methods to address the error code 0x80070643 during SQL Server 2019 installation:

1. Verify system compatibility: Confirm that your computer adheres to the required specifications for SQL Server 2019. Assess the necessary hardware and software, such as operating system type, CPU, RAM, and available storage.
2. Turn off antivirus programmes: Antivirus applications might disrupt the setup. Temporarily deactivate your antivirus and attempt the SQL Server 2019 installation once more.
3. Install with administrative privileges: Right-click the SQL Server 2019 setup file and choose 'Run as administrator' to grant all necessary permissions for the installation.
4. Update your Windows: Ensure your system is fully updated by navigating to Settings > Update & Security > Windows Update and checking for new updates.
5. Remove earlier SQL Server versions: Prior to installing SQL Server 2019, remove any older SQL Server installations from your system.
6. Utilise the SQL Server Installation Centre: For a guided installation of SQL Server 2019, use the SQL Server Installation Centre, which helps to circumvent common installation issues.
7. Review installation logs: Should the installation falter, consult the installation logs for clues. These logs are located in the %ProgramFiles%\Microsoft SQL Serverh\Setup Bootstrap\Log directory.