Definitive Solution to SQL Server 2017 Installation Error 0x800F0906

Tackling the installation error code 0x800F0906 for SQL Server 2017 can be managed through several strategies:

1. Ensure .NET Framework 3.5 Installation: Absence of .NET Framework 3.5 on your system might be causing this error. Navigate to Control Panel > Programs and Features > Turn Windows features on or off > check .NET Framework 3.5 (includes .NET 2.0 and 3.0) > confirm by clicking OK.
2. Temporarily Disable Antivirus Programs: Antivirus applications might block necessary installation processes. Consider disabling your antivirus briefly to proceed with the installation.
3. Opt for Physical or Virtual Media Installation: If direct downloads falter, switch to using physical or virtual media. Load the SQL Server 2017 ISO on a DVD or virtual drive and execute the setup.exe from there.
4. Verify System Compatibility: Confirm that your computer meets SQL Server 2017’s specifications. Review the necessary hardware and software criteria on the official Microsoft site.
5. Administrate Installation Rights: To ensure all permissions are correctly set, right-click the setup.exe and select 'Run as administrator.'
6. Activate Windows Update Service: The installation may require the latest updates. Check that Windows Update is active by navigating to Control Panel > Administrative Tools > Services > Windows Update > right-click > Start if needed.
7. Perform a Clean System Boot: To prevent software conflicts during installation, initiate a clean boot. Access 'msconfig' via Start, select 'System Configuration,' choose 'Selective startup,' uncheck 'Load startup items,' click OK, and reboot your computer.