If basic steps fail, the following deep-level fixes are often required:

Install the latest or Service Pack (e.g., SP2 Update 15) to address bugs related to newer Windows builds. Check User Groups : Open Computer Management > Local Users and Groups .

WinCC requires specific licenses for runtime components (Power Tags, Archive licenses, etc.).

Siemens provides a hidden gem: ( CCDiag.exe ). Located in: C:\Program Files (x86)\Siemens\WinCC\bin\

Siemens support can perform deeper analysis using internal debugging flags ( /@/DEBUG in runtime start parameters).