How to solve the error code 0x800F0906: SQL Server 2017 installation failed

There are several possible solutions to the error code 0x800F0906 when installing SQL Server 2017:

1. Install .NET Framework 3.5: This error can occur if the .NET Framework 3.5 is not installed on the system. To install it, go to Control Panel > Programs and Features > Turn Windows features on or off > select .NET Framework 3.5 (includes .NET 2.0 and 3.0) > click OK.
2. Disable antivirus software: Antivirus software can sometimes interfere with the installation process. Try disabling it temporarily and then attempt the installation again.
3. Use the installation media: If you are installing SQL Server 2017 from a downloaded file, try using the installation media instead. Burn the ISO file to a DVD or mount it as a virtual drive and then run the setup.exe file.
4. Check system requirements: Make sure that your system meets the minimum requirements for SQL Server 2017. Check the hardware and software requirements on the Microsoft website.
5. Run the installation as an administrator: Right-click on the setup.exe file and select "Run as administrator" to ensure that the installation has the necessary permissions.
6. Check the Windows Update service: Make sure that the Windows Update service is running and up-to-date. Go to Control Panel > Administrative Tools > Services > Windows Update > right-click and select "Start" if it is not already running.
7. Clean boot the system: Try performing a clean boot of the system to eliminate any conflicts with other software or services. Go to Start > type "msconfig" > select "System Configuration" > select "Selective startup" > uncheck "Load startup items" > click OK > restart the system.