How to solve the error code 0x84B50000: SQL Server 2012 Setup Failure

There are several possible solutions to the error code 0x84B50000 when installing SQL Server 2012:

1. Check system requirements: Make sure that your system meets the minimum requirements for SQL Server 2012. Check the hardware and software requirements, including the operating system version, processor, memory, and disk space.
2. Disable antivirus software: Antivirus software can interfere with the installation process. Disable any antivirus software before installing SQL Server 2012.
3. Run setup as administrator: Right-click on the setup file and select "Run as administrator" to ensure that the installation has the necessary permissions.
4. Check for Windows updates: Make sure that your system is up-to-date with the latest Windows updates. Install any pending updates and try the installation again.
5. Clean boot: Perform a clean boot of your system to eliminate any conflicts with other software or services. To do this, open the System Configuration tool, select the "Selective startup" option, and uncheck all the boxes except for "Load system services."
6. Repair .NET Framework: SQL Server 2012 requires .NET Framework 3.5 SP1 or later. If you encounter the error code 0x84B50000, try repairing the .NET Framework installation.
7. Uninstall previous versions: If you have any previous versions of SQL Server installed, uninstall them before installing SQL Server 2012.
8. Check installation logs: Check the installation logs for any errors or warnings that may provide more information about the cause of the error. The logs can be found in the %ProgramFiles%\Microsoft SQL Server\110\Setup Bootstrap\Log folder.