Right-click > Manage > Local Users and Groups > Groups . Ensure your username is a member of: SIMATIC HMI SIMATIC HMI Viewer Administrators 6. Repairing the Project (Security Controller)
Close all WinCC applications and run the Reset_WinCC.vbs script located in the WinCC installation directory (usually under Siemens/WinCC/bin ). Restart your computer after it finishes . A Basic Application Could Not Be Started Wincc 7.5
This will re-apply necessary DCOM and registry permissions that WinCC needs to launch its core components. 7. Rebuild the Project Header Right-click > Manage > Local Users and Groups > Groups