: Ensure your version of Windows 10/11 is compatible with WinCC 7.5 SP1/SP2. Users have reported this error when running WinCC on unsupported Windows builds (e.g., Windows 10 22H2 without necessary updates).

Delete the folder C:\AX NF ZZ (license cache) and restart the ALM service. The folder will be recreated with fresh license data.

For severe cases where previous WinCC versions have left behind traces in the registry, a followed by a fresh WinCC install is often the most reliable "best" fix .

WinCC relies heavily on a local SQL Server instance. If this instance isn't running or was installed incorrectly, the "basic application" will fail to start.

Navigate to Windows Logs → Application . Look for errors from: