The critical SAP process is protected. For example, you can't easily terminate saappsvc.exe.
The core engine of SAP is not visible in Task Manager, and it is designed to be not stop-able.
This means that even you terminate all the processes in Task Manager, SAP still will block all the untrusted files.
You may no longer see any notification, as the GUI might be killed, but SAP is still protecting the PC, as the engine is designed to be separated from the UI.