If this happens with a specific project:
WinCC Configuration Tool (Start → Siemens Automation → WinCC → Tools).WinCC requires a valid Runtime license to start. If the license dongle is missing, broken, or if the "Power Tags" count in the project exceeds the license limit, the startup will fail. a basic application could not be started wincc 75 best
| Check | Action | |-------|--------| | Run as Administrator | Right-click WinCC Explorer → Run as administrator | | Disable Antivirus temporarily | Especially McAfee, Norton, or Kaspersky (known to block WinCC processes) | | Check Windows Event Viewer | Look for Application errors around the same timestamp | | Reboot PC | Clears stuck processes | If this happens with a specific project:
The Basic Application relies on specific Windows services. Verify they are running. Rebuild the project data using WinCC Configuration Tool