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: On Windows 10 (20H2 or later), an outdated Microsoft Edge browser can interfere with the SQL Server instance. Update Edge to the latest version.
The confusion stems from the misleading nature of the message. While it blames the software license, the root cause often lies elsewhere. This comprehensive article will explain the true meaning of this error, dissect its most common causes, and provide a detailed, step-by-step guide to resolving it for good.
The user account logged into Windows is not part of the SIMATIC_HMI group.
UAC (User Account Control) or antivirus software is blocking WinCC processes. A Basic Application Could Not Be Started Wincc 7.5
Here is a step-by-step troubleshooting guide, ordered from the most common/easiest fixes to more advanced solutions.
WinCC compresses its project data. Corruption in the project’s archive can prevent the basic application loader from unpacking necessary files.
Click and follow the instructions to repair the installation. 3. Summary of Solutions Likely Cause Error on Windows 10/11 Compatibility Update to WinCC 7.5 SP2 U15 "Check License" error License missing Re-register license in ALM No specific error Corrupt process Run Reset_WinCC.vbs Error at startup Permissions Add user to SIMATIC_HMI : On Windows 10 (20H2 or later), an
Right-click the Windows Start menu and select . Navigate to System Tools > Local Users and Groups > Groups . Locate the following groups: SIMATIC HMI SIMATIC HMI Viewer SQLServerMSSQLUser$ComputerName$WINCC
Open WinCC Explorer and attempt to open the project again. WinCC will automatically attempt a clean attachment of the .mdf file. Prevention and Best Practices
To prevent the "Basic Application Could Not Be Started" error from recurring on production machines: While it blames the software license, the root
instance separately. Clean the registry of leftover SQL entries before reinstalling WinCC. Sector Size Issue (Windows 11)
. For example, WinCC 7.5 SP2 often requires specific updates (like Update 15) to run on newer Windows 10/11 builds. Update Microsoft Edge
Sometimes the project loses its connection to the local machine settings. Open the project in WinCC Explorer. Right-click on and click Properties . Ensure your computer is listed and active.
Modern Windows (10/11) restricts permissions aggressively. The "basic application" might be failing because it lacks write access to system logs or temp files.
Sudden power loss causes database corruption, leading directly to this error.