Resolving SQL Server 2012 Setup Failure: Error Code 0x84B20001

To resolve the error code 0x84B20001 during SQL Server 2012 installation, consider these strategies:

1. Verify system compatibility: Confirm your computer meets SQL Server 2012's requirements, such as OS version and hardware specs.
2. Temporarily deactivate antivirus: Antivirus programs can disrupt the setup process. Deactivate any such software temporarily.
3. Execute setup with admin rights: Right-click the installation file and choose 'Run as administrator' to acquire necessary privileges.
4. Inspect the installation media: Ensure the DVD or USB is intact; if suspect, copy the setup files to another location and retry.
5. Consult the installation log: For further insights, refer to the log file in the %ProgramFiles%\Microsoft SQL ServerH\Setup Bootstrap\Log directory.
6. Remove previous SQL Server versions: Uninstall any former SQL Server editions before proceeding with the new installation.
7. Update your system: Installing the latest service pack for your operating system could rectify many issues.