How to solve the error code 0x800F0906: SQL Server 2016 installation failed

There are several possible solutions to this error code:

1. Install .NET Framework 3.5: This error code may occur if the .NET Framework 3.5 is not installed on your system. You can install it by going to Control Panel > Programs and Features > Turn Windows features on or off > .NET Framework 3.5 (includes .NET 2.0 and 3.0).
2. Disable antivirus software: Sometimes, antivirus software can interfere with the installation process. Try disabling your antivirus software temporarily and then try installing SQL Server 2016 again.
3. Use the installation media: If you are installing SQL Server 2016 from a downloaded file, try using the installation media instead. Burn the ISO file to a DVD or USB drive and then try installing from there.
4. Check system requirements: Make sure that your system meets the minimum requirements for installing SQL Server 2016. Check the Microsoft website for the system requirements.
5. 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.
6. Check the installation log: The installation log may provide more information about the error. Check the log file for any error messages and try to resolve them.
7. Clean boot your system: Sometimes, third-party software can interfere with the installation process. Try performing a clean boot of your system and then try installing SQL Server 2016 again.