During installation and deep troubleshooting, disable 3rd party firewalls. If the error disappears, you need to add WinCC exceptions to your security software.
If none of the above resolves the issue, gather the following and open a ticket with Siemens Industry Online Support: a basic application could not be started wincc 75
When WinCC throws this error, it’s usually because one of these foundational components failed to launch, timed out, or encountered a corrupted configuration. During installation and deep troubleshooting
In WinCC 7.5 SP2, the terminal bus adapter must be connected to a network (switch or router) for certain components to initialize. Step-by-Step Troubleshooting a basic application could not be started wincc 75