The error message "Could not find the database engine startup handle" during SQL Server 2022 installation on Windows 11 may indicate a problem with the SQL Server Database Engine service. You can try the following steps to resolve the issue:
- Open the Services app by pressing the Windows key + R, typing "services.msc", and pressing Enter.
- Locate the SQL Server Database Engine service and ensure that it is running. If it is not running, right-click on it and select "Start".
- If the service is running, try restarting it by right-clicking on it and selecting "Restart".
- If the issue persists, try repairing the SQL Server installation by running the setup program and selecting the "Repair" option.
- If repairing the installation does not work, try uninstalling all instances of SQL Server from your system using the instructions provided in the Microsoft documentation here.
- After uninstalling all instances of SQL Server, try reinstalling SQL Server 2022.
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