Navigating SQL Server 2012 Setup Error 0x84B20001

Address the error code 0x84B20001 with these systematic solutions during your SQL Server 2012 installation:

1. Verify System Specifications: Ensure your system meets SQL Server 2012’s minimum requirements by checking the hardware and software specifications, such as operating system version, processor, memory, and storage capacity.
2. Suspend Antivirus Programs: Security software can occasionally disrupt installation processes. Temporarily disable any antivirus software prior to installing SQL Server 2012.
3. Execute Setup with Administrative Rights: Right-click on the SQL Server 2012 setup file and choose 'Run as administrator' to ensure all necessary permissions for installation are granted.
4. Assess Installation Media: If you’re installing from a DVD or USB drive, confirm that the media is free from damage or corruption. Consider copying the installation files to an alternative location and reattempt the setup from there.
5. Examine Installation Logs: Review the installation logs for detailed error insights. These logs, located in the %ProgramFiles%\Microsoft SQL ServerH\Setup Bootstrap\Log directory, can help identify specific issues.
6. Remove Earlier SQL Server Installations: If any previous versions of SQL Server are installed, uninstall them to prevent potential conflicts during the new installation.
7. Update Operating System: Ensure your operating system is up-to-date by installing the latest available service pack, which can help mitigate compatibility issues.