Final answer:
To identify the applications that start with Windows, Susan should first check the Registry. So, the correct answer is C. The Registry.
Step-by-step explanation:
When a Windows system starts, it loads several applications, services, and processes automatically. Susan should look first in the Registry, which is a hierarchical database that stores configuration settings, user preferences, and system information for Windows. It contains entries that define which applications should start when the system boots up. By accessing the Registry, Susan can identify the applications that start along with the Windows system.
The Windows Registry contains information, settings, options, and other values for programs and hardware installed on all versions of Microsoft Windows operating systems. Specifically, the startup applications can be found in the registry under the following paths: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run for user-specific applications, and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run for system-wide applications. These registry keys allow programs to run each time that a user logs in to the computer.