In , the error message "A basic application could not be started" is a critical startup failure typically indicating that a core component or service required by the WinCC Explorer cannot initialize . Common Causes & Solutions
"A Basic Application Could Not Be Started" in SIMATIC WinCC 7.5
Troubleshooting “A Basic Application Could Not Be Started” in WinCC 7.5
Alternatively, use the tool. You can find this in the WinCC installation directory (usually bin folder). Running this script terminates all background WinCC processes safely. 4. Verify SQL Server (WinCC Instance) WinCC 7.5 uses a specific SQL instance named WINCC . Press Win + R , type services.msc , and hit Enter. Locate SQL Server (WINCC) .