How to solve the error code 0x80070003: SQL Server 2014 installation error

There are several steps you can take to solve the error code 0x80070003 during SQL Server 2014 installation:

1. Check the system requirements: Make sure that your system meets the minimum requirements for SQL Server 2014 installation. 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 your antivirus software temporarily and try the installation again.
3. Run the installation as an administrator: Right-click on the installation file and select "Run as administrator." This will give the installation process the necessary permissions to complete the installation.
4. Check the installation media: If you are installing from a DVD or USB drive, make sure that the media is not damaged or corrupted. Try copying the installation files to a different location and run the installation from there.
5. Clean up the registry: Use a registry cleaner tool to clean up any registry errors that may be causing the installation error.
6. Check the Windows Update: Make sure that your system is up to date with the latest Windows updates. Install any pending updates and try the installation again.